8081681888 has 24 divisors (see below), whose sum is σ = 18183784752. Its totient is φ = 3463577856.

The previous prime is 8081681873. The next prime is 8081681891. The reversal of 8081681888 is 8881861808.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18039245 + ... + 18039692.

It is an arithmetic number, because the mean of its divisors is an integer number (757657698).

Almost surely, 2^8081681888 is an apocalyptic number.

It is an amenable number.

8081681888 is an abundant number, since it is smaller than the sum of its proper divisors (10102102864).

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

8081681888 is a wasteful number, since it uses less digits than its factorization.

8081681888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36078954 (or 36078946 counting only the distinct ones).

The product of its (nonzero) digits is 1572864, while the sum is 56.

The square root of 8081681888 is about 89898.1751093981. The cubic root of 8081681888 is about 2006.7837880938.

The spelling of 8081681888 in words is "eight billion, eighty-one million, six hundred eighty-one thousand, eight hundred eighty-eight".