256620734601136 has 10 divisors (see below), whose sum is σ = 497202673289732. Its totient is φ = 128310367300560.

The previous prime is 256620734601097. The next prime is 256620734601221. The reversal of 256620734601136 is 631106437026652.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8019397956270 + ... + 8019397956301.

Almost surely, 2^{256620734601136} is an apocalyptic number.

It is an amenable number.

256620734601136 is a deficient number, since it is larger than the sum of its proper divisors (240581938688596).

256620734601136 is a wasteful number, since it uses less digits than its factorization.

256620734601136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16038795912579 (or 16038795912573 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 52.

The spelling of 256620734601136 in words is "two hundred fifty-six trillion, six hundred twenty billion, seven hundred thirty-four million, six hundred one thousand, one hundred thirty-six".