656642492 has 12 divisors (see below), whose sum is σ = 1253590296. Its totient is φ = 298473840.

The previous prime is 656642471. The next prime is 656642513. The reversal of 656642492 is 294246656.

656642492 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (656642471) and next prime (656642513).

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 14923693 = 656642492 / (6 + 5 + 6 + 6 + 4 + 2 + 4 + 9 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7461803 + ... + 7461890.

It is an arithmetic number, because the mean of its divisors is an integer number (104465858).

Almost surely, 2^656642492 is an apocalyptic number.

It is an amenable number.

656642492 is a deficient number, since it is larger than the sum of its proper divisors (596947804).

656642492 is a wasteful number, since it uses less digits than its factorization.

656642492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14923708 (or 14923706 counting only the distinct ones).

The product of its digits is 622080, while the sum is 44.

The square root of 656642492 is about 25625.0364292424. The cubic root of 656642492 is about 869.1798727454.

The spelling of 656642492 in words is "six hundred fifty-six million, six hundred forty-two thousand, four hundred ninety-two".