256515626322 has 162 divisors, whose sum is σ = 602194838661. Its totient is φ = 78903421920.

The previous prime is 256515626317. The next prime is 256515626431. The reversal of 256515626322 is 223626515652.

256515626322 is a `hidden beast` number, since 2 + 5 + 6 + 5 + 1 + 5 + 6 + 2 + 632 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 173756419281 + 82759207041 = 416841^2 + 287679^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=358131.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 2490442923 + ... + 2490443025.

Almost surely, 2^256515626322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256515626322

256515626322 is an abundant number, since it is smaller than the sum of its proper divisors (345679212339).

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

256515626322 is a wasteful number, since it uses less digits than its factorization.

256515626322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374 (or 188 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 45.

The spelling of 256515626322 in words is "two hundred fifty-six billion, five hundred fifteen million, six hundred twenty-six thousand, three hundred twenty-two".