681694916 has 24 divisors (see below), whose sum is σ = 1368835776. Its totient is φ = 290988000.

The previous prime is 681694889. The next prime is 681694931. The reversal of 681694916 is 619496186.

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 7 ways as a sum of consecutive naturals, for example, 41471 + ... + 55526.

It is an arithmetic number, because the mean of its divisors is an integer number (57034824).

Almost surely, 2^681694916 is an apocalyptic number.

It is an amenable number.

681694916 is an abundant number, since it is smaller than the sum of its proper divisors (687140860).

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

681694916 is a wasteful number, since it uses less digits than its factorization.

681694916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97259 (or 97257 counting only the distinct ones).

The product of its digits is 559872, while the sum is 50.

The square root of 681694916 is about 26109.2879259470. The cubic root of 681694916 is about 880.0959416746.

The spelling of 681694916 in words is "six hundred eighty-one million, six hundred ninety-four thousand, nine hundred sixteen".