256976556970 has 40 divisors (see below), whose sum is σ = 539618711364. Its totient is φ = 88106239872.

The previous prime is 256976556877. The next prime is 256976556973. The reversal of 256976556970 is 79655679652.

It can be written as a sum of positive squares in 2 ways, for example, as 220401141961 + 36575415009 = 469469^2 + 191247^2 .

It is a junction number, because it is equal to n+sod(n) for n = 256976556896 and 256976556905.

It is not an unprimeable number, because it can be changed into a prime (256976556973) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5327439 + ... + 5375458.

Almost surely, 2^256976556970 is an apocalyptic number.

256976556970 is an abundant number, since it is smaller than the sum of its proper divisors (282642154394).

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

256976556970 is an equidigital number, since it uses as much as digits as its factorization.

256976556970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10702932 (or 10702911 counting only the distinct ones).

The product of its (nonzero) digits is 214326000, while the sum is 67.

The spelling of 256976556970 in words is "two hundred fifty-six billion, nine hundred seventy-six million, five hundred fifty-six thousand, nine hundred seventy".