256232631400 has 24 divisors (see below), whose sum is σ = 595740868470. Its totient is φ = 102493052480.

The previous prime is 256232631397. The next prime is 256232631407. The reversal of 256232631400 is 4136232652.

It can be written as a sum of positive squares in 3 ways, for example, as 192568258276 + 63664373124 = 438826^2 + 252318^2 .

It is a super-2 number, since 2×256232631400² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256232631407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 640581379 + ... + 640581778.

Almost surely, 2^256232631400 is an apocalyptic number.

256232631400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256232631400 is an abundant number, since it is smaller than the sum of its proper divisors (339508237070).

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

256232631400 is a wasteful number, since it uses less digits than its factorization.

256232631400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281163173 (or 1281163164 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The spelling of 256232631400 in words is "two hundred fifty-six billion, two hundred thirty-two million, six hundred thirty-one thousand, four hundred".