256626654 has 16 divisors (see below), whose sum is σ = 540266880. Its totient is φ = 81039960.

The previous prime is 256626653. The next prime is 256626659. The reversal of 256626654 is 456626652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256626653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1125442 + ... + 1125669.

It is an arithmetic number, because the mean of its divisors is an integer number (33766680).

Almost surely, 2^256626654 is an apocalyptic number.

256626654 is an abundant number, since it is smaller than the sum of its proper divisors (283640226).

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

256626654 is a wasteful number, since it uses less digits than its factorization.

256626654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2251135.

The product of its digits is 518400, while the sum is 42.

The square root of 256626654 is about 16019.5709680378. The cubic root of 256626654 is about 635.4780982081.

The spelling of 256626654 in words is "two hundred fifty-six million, six hundred twenty-six thousand, six hundred fifty-four".