656577632 has 48 divisors (see below), whose sum is σ = 1349686800. Its totient is φ = 314012160.

The previous prime is 656577601. The next prime is 656577641. The reversal of 656577632 is 236775656.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97907 + ... + 104397.

It is an arithmetic number, because the mean of its divisors is an integer number (28118475).

Almost surely, 2^656577632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656577632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (674843400).

656577632 is an abundant number, since it is smaller than the sum of its proper divisors (693109168).

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

656577632 is a wasteful number, since it uses less digits than its factorization.

656577632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6639 (or 6631 counting only the distinct ones).

The product of its digits is 1587600, while the sum is 47.

The square root of 656577632 is about 25623.7708388129. The cubic root of 656577632 is about 869.1512539949.

The spelling of 656577632 in words is "six hundred fifty-six million, five hundred seventy-seven thousand, six hundred thirty-two".