691379812232 has 36 divisors (see below), whose sum is σ = 1305757601295. Its totient is φ = 343195805248.

The previous prime is 691379812199. The next prime is 691379812241. The reversal of 691379812232 is 232218973196.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

691379812232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 1473484996 + 689906327236 = 38386^2 + 830606^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=587954.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 350419598 + ... + 350421570.

Almost surely, 2^691379812232 is an apocalyptic number.

It is an amenable number.

691379812232 is a deficient number, since it is larger than the sum of its proper divisors (614377789063).

691379812232 is an frugal number, since it uses more digits than its factorization.

691379812232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4250 (or 2124 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 53.

The spelling of 691379812232 in words is "six hundred ninety-one billion, three hundred seventy-nine million, eight hundred twelve thousand, two hundred thirty-two".