656819484732 has 18 divisors (see below), whose sum is σ = 1660293697608. Its totient is φ = 218939828232.

The previous prime is 656819484719. The next prime is 656819484749. The reversal of 656819484732 is 237484918656.

656819484732 is a `hidden beast` number, since 6 + 5 + 6 + 81 + 9 + 484 + 73 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×656819484732² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 656819484732.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9122492808 + ... + 9122492879.

It is an arithmetic number, because the mean of its divisors is an integer number (92238538756).

Almost surely, 2^656819484732 is an apocalyptic number.

It is an amenable number.

656819484732 is an abundant number, since it is smaller than the sum of its proper divisors (1003474212876).

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

656819484732 is a wasteful number, since it uses less digits than its factorization.

656819484732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18244985697 (or 18244985692 counting only the distinct ones).

The product of its digits is 69672960, while the sum is 63.

The spelling of 656819484732 in words is "six hundred fifty-six billion, eight hundred nineteen million, four hundred eighty-four thousand, seven hundred thirty-two".