681051684 has 12 divisors (see below), whose sum is σ = 1589120624. Its totient is φ = 227017224.

The previous prime is 681051677. The next prime is 681051727. The reversal of 681051684 is 486150186.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28377142 + ... + 28377165.

Almost surely, 2^681051684 is an apocalyptic number.

It is an amenable number.

681051684 is an abundant number, since it is smaller than the sum of its proper divisors (908068940).

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

681051684 is a wasteful number, since it uses less digits than its factorization.

681051684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56754314 (or 56754312 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 681051684 is about 26096.9669502032. The cubic root of 681051684 is about 879.8190416480.

The spelling of 681051684 in words is "six hundred eighty-one million, fifty-one thousand, six hundred eighty-four".