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61262355197 = 317193256641
BaseRepresentation
bin111001000011100001…
…010101101011111101
312212010110221002112102
4321003201111223331
52000431130331242
644051000514445
74266065266361
oct710341255375
9185113832472
1061262355197
1123a8800321a
12ba5877ba25
135a14144624
142d723b52a1
1518d84a8e32
hexe43855afd

61262355197 has 4 divisors (see below), whose sum is σ = 61455612156. Its totient is φ = 61069098240.

The previous prime is 61262355137. The next prime is 61262355221. The reversal of 61262355197 is 79155326216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24678524836 + 36583830361 = 157094^2 + 191269^2 .

It is a cyclic number.

It is not a de Polignac number, because 61262355197 - 234 = 44082486013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61262355107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96628004 + ... + 96628637.

It is an arithmetic number, because the mean of its divisors is an integer number (15363903039).

Almost surely, 261262355197 is an apocalyptic number.

It is an amenable number.

61262355197 is a deficient number, since it is larger than the sum of its proper divisors (193256959).

61262355197 is a wasteful number, since it uses less digits than its factorization.

61262355197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193256958.

The product of its digits is 680400, while the sum is 47.

The spelling of 61262355197 in words is "sixty-one billion, two hundred sixty-two million, three hundred fifty-five thousand, one hundred ninety-seven".

Divisors: 1 317 193256641 61262355197