681519992 has 32 divisors (see below), whose sum is σ = 1348423200. Its totient is φ = 322274304.

The previous prime is 681519989. The next prime is 681520001. The reversal of 681519992 is 299915186.

It is a self number, because there is not a number n which added to its sum of digits gives 681519992.

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, 4433 + ... + 37184.

It is an arithmetic number, because the mean of its divisors is an integer number (42138225).

Almost surely, 2^681519992 is an apocalyptic number.

It is an amenable number.

681519992 is a deficient number, since it is larger than the sum of its proper divisors (666903208).

681519992 is a wasteful number, since it uses less digits than its factorization.

681519992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41735 (or 41731 counting only the distinct ones).

The product of its digits is 349920, while the sum is 50.

The square root of 681519992 is about 26105.9378686153. The cubic root of 681519992 is about 880.0206572286.

The spelling of 681519992 in words is "six hundred eighty-one million, five hundred nineteen thousand, nine hundred ninety-two".