256155832770 has 32 divisors (see below), whose sum is σ = 629071071552. Its totient is φ = 66719658432.

The previous prime is 256155832763. The next prime is 256155832789. The reversal of 256155832770 is 77238551652.

It is a happy 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, 99283917 + ... + 99286496.

It is an arithmetic number, because the mean of its divisors is an integer number (19658470986).

Almost surely, 2^256155832770 is an apocalyptic number.

256155832770 is an abundant number, since it is smaller than the sum of its proper divisors (372915238782).

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

256155832770 is a wasteful number, since it uses less digits than its factorization.

256155832770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198570466.

The product of its (nonzero) digits is 3528000, while the sum is 51.

The spelling of 256155832770 in words is "two hundred fifty-six billion, one hundred fifty-five million, eight hundred thirty-two thousand, seven hundred seventy".