691199952372 has 48 divisors (see below), whose sum is σ = 1792044676800. Its totient is φ = 230394224160.

The previous prime is 691199952361. The next prime is 691199952383. The reversal of 691199952372 is 273259991196.

691199952372 is a `hidden beast` number, since 6 + 9 + 1 + 19 + 99 + 523 + 7 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (691199952361) and next prime (691199952383).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8597722 + ... + 8677742.

It is an arithmetic number, because the mean of its divisors is an integer number (37334264100).

Almost surely, 2^691199952372 is an apocalyptic number.

It is an amenable number.

691199952372 is an abundant number, since it is smaller than the sum of its proper divisors (1100844724428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

691199952372 is a wasteful number, since it uses less digits than its factorization.

691199952372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160013 (or 160005 counting only the distinct ones).

The product of its digits is 16533720, while the sum is 63.

The spelling of 691199952372 in words is "six hundred ninety-one billion, one hundred ninety-nine million, nine hundred fifty-two thousand, three hundred seventy-two".