691842688372 has 24 divisors (see below), whose sum is σ = 1326052721952. Its totient is φ = 313221060000.

The previous prime is 691842688367. The next prime is 691842688403. The reversal of 691842688372 is 273886248196.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31311063 + ... + 31333150.

It is an arithmetic number, because the mean of its divisors is an integer number (55252196748).

Almost surely, 2^691842688372 is an apocalyptic number.

It is an amenable number.

691842688372 is a deficient number, since it is larger than the sum of its proper divisors (634210033580).

691842688372 is a wasteful number, since it uses less digits than its factorization.

691842688372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62644479 (or 62644477 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 64.

The spelling of 691842688372 in words is "six hundred ninety-one billion, eight hundred forty-two million, six hundred eighty-eight thousand, three hundred seventy-two".