65470106781261 has 72 divisors (see below), whose sum is σ = 122554880000280. Its totient is φ = 33342865968384.

The previous prime is 65470106781253. The next prime is 65470106781281. The reversal of 65470106781261 is 16218760107456.

65470106781261 is a `hidden beast` number, since 6 + 5 + 470 + 10 + 67 + 81 + 26 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 12893018769225 + 52577088012036 = 3590685^2 + 7251006^2 .

It is not a de Polignac number, because 65470106781261 - 2³ = 65470106781253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65470106781198 and 65470106781207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65470106781221) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 196728030 + ... + 197060543.

It is an arithmetic number, because the mean of its divisors is an integer number (1702151111115).

Almost surely, 2^{65470106781261} is an apocalyptic number.

It is an amenable number.

65470106781261 is a deficient number, since it is larger than the sum of its proper divisors (57084773219019).

65470106781261 is a wasteful number, since it uses less digits than its factorization.

65470106781261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393788635 (or 393788625 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 65470106781261 in words is "sixty-five trillion, four hundred seventy billion, one hundred six million, seven hundred eighty-one thousand, two hundred sixty-one".