256613032730131 has 32 divisors (see below), whose sum is σ = 338760934732800. Its totient is φ = 188191400371200.

The previous prime is 256613032730123. The next prime is 256613032730141. The reversal of 256613032730131 is 131037230316652.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 256613032730131 - 2³ = 256613032730123 is a prime.

It is a super-2 number, since 2×256613032730131² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256613032730141) 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, 52154170 + ... + 56861968.

It is an arithmetic number, because the mean of its divisors is an integer number (10586279210400).

Almost surely, 2^{256613032730131} is an apocalyptic number.

256613032730131 is a deficient number, since it is larger than the sum of its proper divisors (82147902002669).

256613032730131 is a wasteful number, since it uses less digits than its factorization.

256613032730131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4749475.

The product of its (nonzero) digits is 408240, while the sum is 43.

The spelling of 256613032730131 in words is "two hundred fifty-six trillion, six hundred thirteen billion, thirty-two million, seven hundred thirty thousand, one hundred thirty-one".