9812172816 has 60 divisors (see below), whose sum is σ = 28477521072. Its totient is φ = 3270722976.

The previous prime is 9812172749. The next prime is 9812172833. The reversal of 9812172816 is 6182712189.

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, 1257966 + ... + 1265741.

Almost surely, 2^9812172816 is an apocalyptic number.

It is an amenable number.

9812172816 is an abundant number, since it is smaller than the sum of its proper divisors (18665348256).

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

9812172816 is a wasteful number, since it uses less digits than its factorization.

9812172816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2523730 (or 2523712 counting only the distinct ones).

The product of its digits is 96768, while the sum is 45.

The square root of 9812172816 is about 99056.4122911788. The cubic root of 9812172816 is about 2140.8606326711.

The spelling of 9812172816 in words is "nine billion, eight hundred twelve million, one hundred seventy-two thousand, eight hundred sixteen".