691163232988 has 24 divisors (see below), whose sum is σ = 1284174464832. Its totient is φ = 324367025664.

The previous prime is 691163232967. The next prime is 691163233003. The reversal of 691163232988 is 889232361196.

It is a super-2 number, since 2×691163232988² (a number of 24 digits) contains 22 as substring.

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, 13822681 + ... + 13872592.

It is an arithmetic number, because the mean of its divisors is an integer number (53507269368).

Almost surely, 2^691163232988 is an apocalyptic number.

691163232988 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

691163232988 is a deficient number, since it is larger than the sum of its proper divisors (593011231844).

691163232988 is a wasteful number, since it uses less digits than its factorization.

691163232988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27695661 (or 27695659 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 58.

The spelling of 691163232988 in words is "six hundred ninety-one billion, one hundred sixty-three million, two hundred thirty-two thousand, nine hundred eighty-eight".