681548672 has 32 divisors (see below), whose sum is σ = 1551742320. Its totient is φ = 292091904.

The previous prime is 681548657. The next prime is 681548701. The reversal of 681548672 is 276845186.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

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, 379433 + ... + 381224.

Almost surely, 2^681548672 is an apocalyptic number.

It is an amenable number.

681548672 is an abundant number, since it is smaller than the sum of its proper divisors (870193648).

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

681548672 is an equidigital number, since it uses as much as digits as its factorization.

681548672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760678 (or 760666 counting only the distinct ones).

The product of its digits is 645120, while the sum is 47.

The square root of 681548672 is about 26106.4871631554. The cubic root of 681548672 is about 880.0330015172.

The spelling of 681548672 in words is "six hundred eighty-one million, five hundred forty-eight thousand, six hundred seventy-two".