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61452078840261 = 3210167604047129
BaseRepresentation
bin11011111100011111011010…
…10101000111100111000101
322001120202120000220111210200
431332033231111013213011
531023312324140342021
6334410410103241113
715641523541426134
oct1576175525074705
9261522500814720
1061452078840261
11186427534a894a
126a859a8a49199
132839ba1b14975
1411264217b191b
15718799d40126
hex37e3ed5479c5

61452078840261 has 12 divisors (see below), whose sum is σ = 89642966494380. Its totient is φ = 40562428276800.

The previous prime is 61452078840247. The next prime is 61452078840283. The reversal of 61452078840261 is 16204887025416.

61452078840261 is a `hidden beast` number, since 6 + 1 + 4 + 520 + 78 + 8 + 40 + 2 + 6 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 55779612530625 + 5672466309636 = 7468575^2 + 2381694^2 .

It is not a de Polignac number, because 61452078840261 - 222 = 61452074645957 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 61452078840198 and 61452078840207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61452078840211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33802022656 + ... + 33802024473.

It is an arithmetic number, because the mean of its divisors is an integer number (7470247207865).

Almost surely, 261452078840261 is an apocalyptic number.

It is an amenable number.

61452078840261 is a deficient number, since it is larger than the sum of its proper divisors (28190887654119).

61452078840261 is a wasteful number, since it uses less digits than its factorization.

61452078840261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67604047236 (or 67604047233 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 54.

The spelling of 61452078840261 in words is "sixty-one trillion, four hundred fifty-two billion, seventy-eight million, eight hundred forty thousand, two hundred sixty-one".

Divisors: 1 3 9 101 303 909 67604047129 202812141387 608436424161 6828008760029 20484026280087 61452078840261