656271020 has 24 divisors (see below), whose sum is σ = 1450705200. Its totient is φ = 248692032.

The previous prime is 656271019. The next prime is 656271041. The reversal of 656271020 is 20172656.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 863135 + ... + 863894.

It is an arithmetic number, because the mean of its divisors is an integer number (60446050).

Almost surely, 2^656271020 is an apocalyptic number.

It is an amenable number.

656271020 is an abundant number, since it is smaller than the sum of its proper divisors (794434180).

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

656271020 is a wasteful number, since it uses less digits than its factorization.

656271020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727057 (or 1727055 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 656271020 is about 25617.7871800044. The cubic root of 656271020 is about 869.0159393549.

The spelling of 656271020 in words is "six hundred fifty-six million, two hundred seventy-one thousand, twenty".