691636636196 has 12 divisors (see below), whose sum is σ = 1320397214640. Its totient is φ = 314380289160.

The previous prime is 691636636189. The next prime is 691636636241.

691636636196 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×691636636196² (a number of 24 digits) contains 22 as substring.

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, 7859507186 + ... + 7859507273.

It is an arithmetic number, because the mean of its divisors is an integer number (110033101220).

Almost surely, 2^691636636196 is an apocalyptic number.

It is an amenable number.

691636636196 is a deficient number, since it is larger than the sum of its proper divisors (628760578444).

691636636196 is a wasteful number, since it uses less digits than its factorization.

691636636196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15719014474 (or 15719014472 counting only the distinct ones).

The product of its digits is 34012224, while the sum is 62.

The spelling of 691636636196 in words is "six hundred ninety-one billion, six hundred thirty-six million, six hundred thirty-six thousand, one hundred ninety-six".