256621526622370 has 96 divisors (see below), whose sum is σ = 584933026499712. Its totient is φ = 79327727571456.

The previous prime is 256621526622367. The next prime is 256621526622389. The reversal of 256621526622370 is 73226625126652.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 251728947 + ... + 252746326.

It is an arithmetic number, because the mean of its divisors is an integer number (6093052359372).

Almost surely, 2^{256621526622370} is an apocalyptic number.

256621526622370 is an abundant number, since it is smaller than the sum of its proper divisors (328311499877342).

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

256621526622370 is a wasteful number, since it uses less digits than its factorization.

256621526622370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504475356 (or 504475343 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 55.

The spelling of 256621526622370 in words is "two hundred fifty-six trillion, six hundred twenty-one billion, five hundred twenty-six million, six hundred twenty-two thousand, three hundred seventy".