256099374771 has 16 divisors (see below), whose sum is σ = 348348902400. Its totient is φ = 167309640608.

The previous prime is 256099374719. The next prime is 256099374781. The reversal of 256099374771 is 177473990652.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256099374771 is a prime.

It is a super-2 number, since 2×256099374771² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (256099374701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2226051 + ... + 2338268.

It is an arithmetic number, because the mean of its divisors is an integer number (21771806400).

Almost surely, 2^256099374771 is an apocalyptic number.

256099374771 is a deficient number, since it is larger than the sum of its proper divisors (92249527629).

256099374771 is a wasteful number, since it uses less digits than its factorization.

256099374771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4564698.

The product of its (nonzero) digits is 20003760, while the sum is 60.

The spelling of 256099374771 in words is "two hundred fifty-six billion, ninety-nine million, three hundred seventy-four thousand, seven hundred seventy-one".