256606557255272 has 32 divisors (see below), whose sum is σ = 550242478019520. Its totient is φ = 109899982043520.

The previous prime is 256606557255221. The next prime is 256606557255311. The reversal of 256606557255272 is 272552755606652.

It is a junction number, because it is equal to n+sod(n) for n = 256606557255199 and 256606557255208.

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, 1546932578 + ... + 1547098449.

It is an arithmetic number, because the mean of its divisors is an integer number (17195077438110).

Almost surely, 2^{256606557255272} is an apocalyptic number.

It is an amenable number.

256606557255272 is an abundant number, since it is smaller than the sum of its proper divisors (293635920764248).

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

256606557255272 is a wasteful number, since it uses less digits than its factorization.

256606557255272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3094032521 (or 3094032517 counting only the distinct ones).

The product of its (nonzero) digits is 529200000, while the sum is 65.

The spelling of 256606557255272 in words is "two hundred fifty-six trillion, six hundred six billion, five hundred fifty-seven million, two hundred fifty-five thousand, two hundred seventy-two".