681100884 has 36 divisors (see below), whose sum is σ = 1768206804. Its totient is φ = 220897152.

The previous prime is 681100867. The next prime is 681100939. The reversal of 681100884 is 488001186.

It can be written as a sum of positive squares in 2 ways, for example, as 565107984 + 115992900 = 23772^2 + 10770^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 254337 + ... + 257000.

Almost surely, 2^681100884 is an apocalyptic number.

It is an amenable number.

681100884 is an abundant number, since it is smaller than the sum of its proper divisors (1087105920).

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

681100884 is a wasteful number, since it uses less digits than its factorization.

681100884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511384 (or 511379 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 681100884 is about 26097.9095714580. The cubic root of 681100884 is about 879.8402275362.

The spelling of 681100884 in words is "six hundred eighty-one million, one hundred thousand, eight hundred eighty-four".