656693167438 has 32 divisors (see below), whose sum is σ = 1240762376448. Its totient is φ = 253216800000.

The previous prime is 656693167393. The next prime is 656693167457. The reversal of 656693167438 is 834761396656.

It is a self number, because there is not a number n which added to its sum of digits gives 656693167438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21965688 + ... + 21995563.

It is an arithmetic number, because the mean of its divisors is an integer number (38773824264).

Almost surely, 2^656693167438 is an apocalyptic number.

656693167438 is a deficient number, since it is larger than the sum of its proper divisors (584069209010).

656693167438 is a wasteful number, since it uses less digits than its factorization.

656693167438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43961368.

The product of its digits is 117573120, while the sum is 64.

The spelling of 656693167438 in words is "six hundred fifty-six billion, six hundred ninety-three million, one hundred sixty-seven thousand, four hundred thirty-eight".