681554888 has 32 divisors (see below), whose sum is σ = 1546387200. Its totient is φ = 274912512.

The previous prime is 681554831. The next prime is 681554893. The reversal of 681554888 is 888455186.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

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, 357008 + ... + 358911.

It is an arithmetic number, because the mean of its divisors is an integer number (48324600).

Almost surely, 2^681554888 is an apocalyptic number.

681554888 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

681554888 is an abundant number, since it is smaller than the sum of its proper divisors (864832312).

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

681554888 is a wasteful number, since it uses less digits than its factorization.

681554888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715949 (or 715945 counting only the distinct ones).

The product of its digits is 2457600, while the sum is 53.

The square root of 681554888 is about 26106.6062137536. The cubic root of 681554888 is about 880.0356769282.

The spelling of 681554888 in words is "six hundred eighty-one million, five hundred fifty-four thousand, eight hundred eighty-eight".