681159616 has 28 divisors (see below), whose sum is σ = 1361559888. Its totient is φ = 338089472.

The previous prime is 681159601. The next prime is 681159623. The reversal of 681159616 is 616951186.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30076 + ... + 47611.

Almost surely, 2^681159616 is an apocalyptic number.

It is an amenable number.

681159616 is a deficient number, since it is larger than the sum of its proper divisors (680400272).

681159616 is a wasteful number, since it uses less digits than its factorization.

681159616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77836 (or 77826 counting only the distinct ones).

The product of its digits is 77760, while the sum is 43.

The square root of 681159616 is about 26099.0347714240. The cubic root of 681159616 is about 879.8655166391.

The spelling of 681159616 in words is "six hundred eighty-one million, one hundred fifty-nine thousand, six hundred sixteen".