256957919030 has 32 divisors (see below), whose sum is σ = 478467025920. Its totient is φ = 99254532960.

The previous prime is 256957919021. The next prime is 256957919047. The reversal of 256957919030 is 30919759652.

It is a happy number.

It is a super-2 number, since 2×256957919030² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 742700 + ... + 1032239.

It is an arithmetic number, because the mean of its divisors is an integer number (14952094560).

Almost surely, 2^256957919030 is an apocalyptic number.

256957919030 is a deficient number, since it is larger than the sum of its proper divisors (221509106890).

256957919030 is a wasteful number, since it uses less digits than its factorization.

256957919030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1775444.

The product of its (nonzero) digits is 4592700, while the sum is 56.

The spelling of 256957919030 in words is "two hundred fifty-six billion, nine hundred fifty-seven million, nine hundred nineteen thousand, thirty".