681027528568 has 32 divisors (see below), whose sum is σ = 1279564758000. Its totient is φ = 339810992640.

The previous prime is 681027528557. The next prime is 681027528589. The reversal of 681027528568 is 865825720186.

It is a super-2 number, since 2×681027528568² (a number of 24 digits) contains 22 as substring.

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, 7550923 + ... + 7640581.

Almost surely, 2^681027528568 is an apocalyptic number.

It is an amenable number.

681027528568 is a deficient number, since it is larger than the sum of its proper divisors (598537229432).

681027528568 is a wasteful number, since it uses less digits than its factorization.

681027528568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91615 (or 91611 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 58.

The spelling of 681027528568 in words is "six hundred eighty-one billion, twenty-seven million, five hundred twenty-eight thousand, five hundred sixty-eight".