691979413876 has 12 divisors (see below), whose sum is σ = 1225553902272. Its totient is φ = 341821156088.

The previous prime is 691979413859. The next prime is 691979413897. The reversal of 691979413876 is 678314979196.

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, 1042137340 + ... + 1042138003.

It is an arithmetic number, because the mean of its divisors is an integer number (102129491856).

Almost surely, 2^691979413876 is an apocalyptic number.

It is an amenable number.

691979413876 is a deficient number, since it is larger than the sum of its proper divisors (533574488396).

691979413876 is a wasteful number, since it uses less digits than its factorization.

691979413876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2084275430 (or 2084275428 counting only the distinct ones).

The product of its digits is 123451776, while the sum is 70.

The spelling of 691979413876 in words is "six hundred ninety-one billion, nine hundred seventy-nine million, four hundred thirteen thousand, eight hundred seventy-six".