8715891816 has 32 divisors (see below), whose sum is σ = 24210811200. Its totient is φ = 2905297200.

The previous prime is 8715891787. The next prime is 8715891871. The reversal of 8715891816 is 6181985178.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 20175460 + ... + 20175891.

It is an arithmetic number, because the mean of its divisors is an integer number (756587850).

Almost surely, 2^8715891816 is an apocalyptic number.

It is an amenable number.

8715891816 is an abundant number, since it is smaller than the sum of its proper divisors (15494919384).

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

8715891816 is a wasteful number, since it uses less digits than its factorization.

8715891816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40351366 (or 40351356 counting only the distinct ones).

The product of its digits is 967680, while the sum is 54.

The square root of 8715891816 is about 93358.9407394921. The cubic root of 8715891816 is about 2057.9616479181.

The spelling of 8715891816 in words is "eight billion, seven hundred fifteen million, eight hundred ninety-one thousand, eight hundred sixteen".