656530105920 has 112 divisors (see below), whose sum is σ = 2244827981760. Its totient is φ = 161607407616.

The previous prime is 656530105897. The next prime is 656530105927. The reversal of 656530105920 is 29501035656.

It is not an unprimeable number, because it can be changed into a prime (656530105927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26290810 + ... + 26315769.

It is an arithmetic number, because the mean of its divisors is an integer number (20043106980).

Almost surely, 2^656530105920 is an apocalyptic number.

656530105920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

656530105920 is an abundant number, since it is smaller than the sum of its proper divisors (1588297875840).

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

656530105920 is a wasteful number, since it uses less digits than its factorization.

656530105920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52606612 (or 52606602 counting only the distinct ones).

The product of its (nonzero) digits is 243000, while the sum is 42.

The spelling of 656530105920 in words is "six hundred fifty-six billion, five hundred thirty million, one hundred five thousand, nine hundred twenty".