656397547140 has 96 divisors (see below), whose sum is σ = 1982743297920. Its totient is φ = 161634543616.

The previous prime is 656397547103. The next prime is 656397547177. The reversal of 656397547140 is 41745793656.

It is an interprime number because it is at equal distance from previous prime (656397547103) and next prime (656397547177).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6016950 + ... + 6125069.

It is an arithmetic number, because the mean of its divisors is an integer number (20653576020).

Almost surely, 2^656397547140 is an apocalyptic number.

656397547140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

656397547140 is an abundant number, since it is smaller than the sum of its proper divisors (1326345750780).

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

656397547140 is a wasteful number, since it uses less digits than its factorization.

656397547140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12142101 (or 12142099 counting only the distinct ones).

The product of its (nonzero) digits is 19051200, while the sum is 57.

The spelling of 656397547140 in words is "six hundred fifty-six billion, three hundred ninety-seven million, five hundred forty-seven thousand, one hundred forty".