256420580624056 has 32 divisors (see below), whose sum is σ = 486585070629840. Its totient is φ = 126664586224128.

The previous prime is 256420580624009. The next prime is 256420580624063. The reversal of 256420580624056 is 650426085024652.

It is a happy number.

256420580624056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×256420580624056² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 256420580623988 and 256420580624006.

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, 86291200 + ... + 89213296.

Almost surely, 2^{256420580624056} is an apocalyptic number.

It is an amenable number.

256420580624056 is a deficient number, since it is larger than the sum of its proper divisors (230164490005784).

256420580624056 is a wasteful number, since it uses less digits than its factorization.

256420580624056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3054343 (or 3054339 counting only the distinct ones).

The product of its (nonzero) digits is 27648000, while the sum is 55.

The spelling of 256420580624056 in words is "two hundred fifty-six trillion, four hundred twenty billion, five hundred eighty million, six hundred twenty-four thousand, fifty-six".