256725504635610 has 32 divisors (see below), whose sum is σ = 616142640298752. Its totient is φ = 68459975772480.

The previous prime is 256725504635573. The next prime is 256725504635623. The reversal of 256725504635610 is 16536405527652.

It is a happy number.

It is a super-2 number, since 2×256725504635610² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3522972 + ... + 22931688.

It is an arithmetic number, because the mean of its divisors is an integer number (19254457509336).

Almost surely, 2^{256725504635610} is an apocalyptic number.

256725504635610 is an abundant number, since it is smaller than the sum of its proper divisors (359417135663142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256725504635610 is a wasteful number, since it uses less digits than its factorization.

256725504635610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19849638.

The product of its (nonzero) digits is 45360000, while the sum is 57.

The spelling of 256725504635610 in words is "two hundred fifty-six trillion, seven hundred twenty-five billion, five hundred four million, six hundred thirty-five thousand, six hundred ten".