256397279370 has 16 divisors (see below), whose sum is σ = 615353470560. Its totient is φ = 68372607824.

The previous prime is 256397279353. The next prime is 256397279441. The reversal of 256397279370 is 73972793652.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4273287960 + ... + 4273288019.

It is an arithmetic number, because the mean of its divisors is an integer number (38459591910).

Almost surely, 2^256397279370 is an apocalyptic number.

256397279370 is an abundant number, since it is smaller than the sum of its proper divisors (358956191190).

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

256397279370 is a wasteful number, since it uses less digits than its factorization.

256397279370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8546575989.

The product of its (nonzero) digits is 30005640, while the sum is 60.

The spelling of 256397279370 in words is "two hundred fifty-six billion, three hundred ninety-seven million, two hundred seventy-nine thousand, three hundred seventy".