256576450172 has 24 divisors (see below), whose sum is σ = 513175842816. Its totient is φ = 109956419568.

The previous prime is 256576450157. The next prime is 256576450181. The reversal of 256576450172 is 271054675652.

It is a self number, because there is not a number n which added to its sum of digits gives 256576450172.

It is a congruent number.

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, 471833 + ... + 857775.

It is an arithmetic number, because the mean of its divisors is an integer number (21382326784).

Almost surely, 2^256576450172 is an apocalyptic number.

It is an amenable number.

256576450172 is an abundant number, since it is smaller than the sum of its proper divisors (256599392644).

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

256576450172 is a wasteful number, since it uses less digits than its factorization.

256576450172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409697 (or 409695 counting only the distinct ones).

The product of its (nonzero) digits is 3528000, while the sum is 50.

The spelling of 256576450172 in words is "two hundred fifty-six billion, five hundred seventy-six million, four hundred fifty thousand, one hundred seventy-two".