256559226512 has 10 divisors (see below), whose sum is σ = 497083501398. Its totient is φ = 128279613248.

The previous prime is 256559226493. The next prime is 256559226559. The reversal of 256559226512 is 215622955652.

It can be written as a sum of positive squares in only one way, i.e., 203307202816 + 53252023696 = 450896^2 + 230764^2 .

It is a super-2 number, since 2×256559226512² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8017475813 + ... + 8017475844.

Almost surely, 2^256559226512 is an apocalyptic number.

It is an amenable number.

256559226512 is a deficient number, since it is larger than the sum of its proper divisors (240524274886).

256559226512 is a wasteful number, since it uses less digits than its factorization.

256559226512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16034951665 (or 16034951659 counting only the distinct ones).

The product of its digits is 3240000, while the sum is 50.

The spelling of 256559226512 in words is "two hundred fifty-six billion, five hundred fifty-nine million, two hundred twenty-six thousand, five hundred twelve".