656468190 has 72 divisors (see below), whose sum is σ = 1985494680. Its totient is φ = 150048864.

The previous prime is 656468177. The next prime is 656468191. The reversal of 656468190 is 91864656.

656468190 is a `hidden beast` number, since 6 + 564 + 6 + 81 + 9 + 0 = 666.

656468190 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×656468190² = 861900968963752200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656468191) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 70020 + ... + 78839.

It is an arithmetic number, because the mean of its divisors is an integer number (27576315).

Almost surely, 2^656468190 is an apocalyptic number.

656468190 is an abundant number, since it is smaller than the sum of its proper divisors (1329026490).

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

656468190 is a wasteful number, since it uses less digits than its factorization.

656468190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148886 (or 148876 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 656468190 is about 25621.6351937186. The cubic root of 656468190 is about 869.1029596615.

The spelling of 656468190 in words is "six hundred fifty-six million, four hundred sixty-eight thousand, one hundred ninety".