681552636992 has 56 divisors (see below), whose sum is σ = 1381433823360. Its totient is φ = 333476948480.

The previous prime is 681552636967. The next prime is 681552637057. The reversal of 681552636992 is 299636255186.

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, 28952267 + ... + 28975797.

Almost surely, 2^681552636992 is an apocalyptic number.

It is an amenable number.

681552636992 is an abundant number, since it is smaller than the sum of its proper divisors (699881186368).

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

681552636992 is a wasteful number, since it uses less digits than its factorization.

681552636992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33219 (or 33209 counting only the distinct ones).

The product of its digits is 41990400, while the sum is 62.

The spelling of 681552636992 in words is "six hundred eighty-one billion, five hundred fifty-two million, six hundred thirty-six thousand, nine hundred ninety-two".