681554684 has 24 divisors (see below), whose sum is σ = 1263901968. Its totient is φ = 320472320.

The previous prime is 681554651. The next prime is 681554693. The reversal of 681554684 is 486455186.

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, 100274 + ... + 106854.

It is an arithmetic number, because the mean of its divisors is an integer number (52662582).

Almost surely, 2^681554684 is an apocalyptic number.

It is an amenable number.

681554684 is a deficient number, since it is larger than the sum of its proper divisors (582347284).

681554684 is a wasteful number, since it uses less digits than its factorization.

681554684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8125 (or 8123 counting only the distinct ones).

The product of its digits is 921600, while the sum is 47.

The square root of 681554684 is about 26106.6023066963. The cubic root of 681554684 is about 880.0355891254.

The spelling of 681554684 in words is "six hundred eighty-one million, five hundred fifty-four thousand, six hundred eighty-four".