256621526602525 has 48 divisors (see below), whose sum is σ = 382845999144960. Its totient is φ = 166691778379200.

The previous prime is 256621526602471. The next prime is 256621526602559. The reversal of 256621526602525 is 525206625126652.

It is not a de Polignac number, because 256621526602525 - 2¹¹ = 256621526600477 is a prime.

It is a congruent number.

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, 31630140 + ... + 38906410.

It is an arithmetic number, because the mean of its divisors is an integer number (7975958315520).

Almost surely, 2^{256621526602525} is an apocalyptic number.

256621526602525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256621526602525 is a deficient number, since it is larger than the sum of its proper divisors (126224472542435).

256621526602525 is a wasteful number, since it uses less digits than its factorization.

256621526602525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7286914 (or 7286909 counting only the distinct ones).

The product of its (nonzero) digits is 25920000, while the sum is 55.

The spelling of 256621526602525 in words is "two hundred fifty-six trillion, six hundred twenty-one billion, five hundred twenty-six million, six hundred two thousand, five hundred twenty-five".