256507172260635 has 32 divisors (see below), whose sum is σ = 410612162577408. Its totient is φ = 136736940936960.

The previous prime is 256507172260531. The next prime is 256507172260637. The reversal of 256507172260635 is 536062271705652.

It is not a de Polignac number, because 256507172260635 - 2¹⁴ = 256507172244251 is a prime.

It is a super-2 number, since 2×256507172260635² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256507172260637) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 366282270 + ... + 366981900.

It is an arithmetic number, because the mean of its divisors is an integer number (12831630080544).

Almost surely, 2^{256507172260635} is an apocalyptic number.

256507172260635 is a deficient number, since it is larger than the sum of its proper divisors (154104990316773).

256507172260635 is a wasteful number, since it uses less digits than its factorization.

256507172260635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711555.

The product of its (nonzero) digits is 31752000, while the sum is 57.

The spelling of 256507172260635 in words is "two hundred fifty-six trillion, five hundred seven billion, one hundred seventy-two million, two hundred sixty thousand, six hundred thirty-five".