8100972808 has 8 divisors (see below), whose sum is σ = 15189324030. Its totient is φ = 4050486400.

The previous prime is 8100972769. The next prime is 8100972809. The reversal of 8100972808 is 8082790018.

It can be written as a sum of positive squares in only one way, i.e., 7344832804 + 756140004 = 85702^2 + 27498^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (8100972809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506310793 + ... + 506310808.

Almost surely, 2^8100972808 is an apocalyptic number.

It is an amenable number.

8100972808 is a deficient number, since it is larger than the sum of its proper divisors (7088351222).

8100972808 is a wasteful number, since it uses less digits than its factorization.

8100972808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012621607 (or 1012621603 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 43.

The square root of 8100972808 is about 90005.4043266292. The cubic root of 8100972808 is about 2008.3792457601.

The spelling of 8100972808 in words is "eight billion, one hundred million, nine hundred seventy-two thousand, eight hundred eight".