256451395650 has 24 divisors (see below), whose sum is σ = 635999461584. Its totient is φ = 68387038800.

The previous prime is 256451395639. The next prime is 256451395679. The reversal of 256451395650 is 56593154652.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 256451395593 and 256451395602.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 854837836 + ... + 854838135.

It is an arithmetic number, because the mean of its divisors is an integer number (26499977566).

Almost surely, 2^256451395650 is an apocalyptic number.

256451395650 is an abundant number, since it is smaller than the sum of its proper divisors (379548065934).

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

256451395650 is a wasteful number, since it uses less digits than its factorization.

256451395650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709675986 (or 1709675981 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 51.

The spelling of 256451395650 in words is "two hundred fifty-six billion, four hundred fifty-one million, three hundred ninety-five thousand, six hundred fifty".