256537231434 has 80 divisors (see below), whose sum is σ = 636450873696. Its totient is φ = 76578242400.

The previous prime is 256537231403. The next prime is 256537231459. The reversal of 256537231434 is 434132735652.

It is a happy number.

256537231434 is a `hidden beast` number, since 2 + 56 + 537 + 2 + 31 + 4 + 34 = 666.

It is a super-2 number, since 2×256537231434² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 256537231434.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 954937 + ... + 1193724.

Almost surely, 2^256537231434 is an apocalyptic number.

256537231434 is an abundant number, since it is smaller than the sum of its proper divisors (379913642262).

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

256537231434 is a wasteful number, since it uses less digits than its factorization.

256537231434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2148753 (or 2148744 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 45.

The spelling of 256537231434 in words is "two hundred fifty-six billion, five hundred thirty-seven million, two hundred thirty-one thousand, four hundred thirty-four".