681506732 has 12 divisors (see below), whose sum is σ = 1197986496. Its totient is φ = 339224880.

The previous prime is 681506711. The next prime is 681506741. The reversal of 681506732 is 237605186.

It is a super-2 number, since 2×681506732² = 928902851522639648, which contains 22 as substring.

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, 381119 + ... + 382902.

It is an arithmetic number, because the mean of its divisors is an integer number (99832208).

Almost surely, 2^681506732 is an apocalyptic number.

It is an amenable number.

681506732 is a deficient number, since it is larger than the sum of its proper divisors (516479764).

681506732 is a wasteful number, since it uses less digits than its factorization.

681506732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764248 (or 764246 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 681506732 is about 26105.6839021697. The cubic root of 681506732 is about 880.0149498149.

The spelling of 681506732 in words is "six hundred eighty-one million, five hundred six thousand, seven hundred thirty-two".