656426520 has 48 divisors (see below), whose sum is σ = 2133387360. Its totient is φ = 175046976.

The previous prime is 656426471. The next prime is 656426539. The reversal of 656426520 is 25624656.

656426520 is a `hidden beast` number, since 6 + 5 + 642 + 6 + 5 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 911344 + ... + 912063.

It is an arithmetic number, because the mean of its divisors is an integer number (44445570).

Almost surely, 2^656426520 is an apocalyptic number.

656426520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

656426520 is an abundant number, since it is smaller than the sum of its proper divisors (1476960840).

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

656426520 is a wasteful number, since it uses less digits than its factorization.

656426520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1823424 (or 1823417 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 656426520 is about 25620.8220008648. The cubic root of 656426520 is about 869.0845702015.

The spelling of 656426520 in words is "six hundred fifty-six million, four hundred twenty-six thousand, five hundred twenty".