681627712 has 28 divisors (see below), whose sum is σ = 1356525100. Its totient is φ = 339826176.

The previous prime is 681627697. The next prime is 681627731. The reversal of 681627712 is 217726186.

It can be written as a sum of positive squares in 2 ways, for example, as 176996416 + 504631296 = 13304^2 + 22464^2 .

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, 7078 + ... + 37594.

It is an arithmetic number, because the mean of its divisors is an integer number (48447325).

Almost surely, 2^681627712 is an apocalyptic number.

It is an amenable number.

681627712 is a deficient number, since it is larger than the sum of its proper divisors (674897388).

681627712 is a wasteful number, since it uses less digits than its factorization.

681627712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30878 (or 30868 counting only the distinct ones).

The product of its digits is 56448, while the sum is 40.

The square root of 681627712 is about 26108.0009192584. Note that the first 3 decimals coincide. The cubic root of 681627712 is about 880.0670196891.

The spelling of 681627712 in words is "six hundred eighty-one million, six hundred twenty-seven thousand, seven hundred twelve".