256506403522724 has 48 divisors (see below), whose sum is σ = 456084355184640. Its totient is φ = 126216398426400.

The previous prime is 256506403522717. The next prime is 256506403522727. The reversal of 256506403522724 is 427225304605652.

It is not an unprimeable number, because it can be changed into a prime (256506403522727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35936309 + ... + 42478595.

It is an arithmetic number, because the mean of its divisors is an integer number (9501757399680).

Almost surely, 2^{256506403522724} is an apocalyptic number.

It is an amenable number.

256506403522724 is a deficient number, since it is larger than the sum of its proper divisors (199577951661916).

256506403522724 is a wasteful number, since it uses less digits than its factorization.

256506403522724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6543048 (or 6543046 counting only the distinct ones).

The product of its (nonzero) digits is 24192000, while the sum is 53.

The spelling of 256506403522724 in words is "two hundred fifty-six trillion, five hundred six billion, four hundred three million, five hundred twenty-two thousand, seven hundred twenty-four".