256535654031 has 12 divisors (see below), whose sum is σ = 374715001440. Its totient is φ = 169102153440.

The previous prime is 256535654017. The next prime is 256535654059. The reversal of 256535654031 is 130456535652.

256535654031 is a `hidden beast` number, since 2 + 5 + 6 + 53 + 56 + 540 + 3 + 1 = 666.

It is not a de Polignac number, because 256535654031 - 2⁶ = 256535653967 is a prime.

It is a super-2 number, since 2×256535654031² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256535655031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160133815 + ... + 160135416.

It is an arithmetic number, because the mean of its divisors is an integer number (31226250120).

Almost surely, 2^256535654031 is an apocalyptic number.

256535654031 is a deficient number, since it is larger than the sum of its proper divisors (118179347409).

256535654031 is a wasteful number, since it uses less digits than its factorization.

256535654031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320269326 (or 320269323 counting only the distinct ones).

The product of its (nonzero) digits is 1620000, while the sum is 45.

The spelling of 256535654031 in words is "two hundred fifty-six billion, five hundred thirty-five million, six hundred fifty-four thousand, thirty-one".