656834494972 has 6 divisors (see below), whose sum is σ = 1149460366208. Its totient is φ = 328417247484.

The previous prime is 656834494933. The next prime is 656834494991. The reversal of 656834494972 is 279494438656.

656834494972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 656834494898 and 656834494907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82104311868 + ... + 82104311875.

Almost surely, 2^656834494972 is an apocalyptic number.

It is an amenable number.

656834494972 is a deficient number, since it is larger than the sum of its proper divisors (492625871236).

656834494972 is a wasteful number, since it uses less digits than its factorization.

656834494972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164208623747 (or 164208623745 counting only the distinct ones).

The product of its digits is 313528320, while the sum is 67.

The spelling of 656834494972 in words is "six hundred fifty-six billion, eight hundred thirty-four million, four hundred ninety-four thousand, nine hundred seventy-two".