816980732875 has 8 divisors (see below), whose sum is σ = 1019591954784. Its totient is φ = 653584586200.

The previous prime is 816980732863. The next prime is 816980732891. The reversal of 816980732875 is 578237089618.

It is a happy number.

It is not a de Polignac number, because 816980732875 - 2²¹ = 816978635723 is a prime.

It is a Duffinian number.

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, 3267922807 + ... + 3267923056.

It is an arithmetic number, because the mean of its divisors is an integer number (127448994348).

Almost surely, 2^816980732875 is an apocalyptic number.

816980732875 is a deficient number, since it is larger than the sum of its proper divisors (202611221909).

816980732875 is an equidigital number, since it uses as much as digits as its factorization.

816980732875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6535845878 (or 6535845868 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 64.

The spelling of 816980732875 in words is "eight hundred sixteen billion, nine hundred eighty million, seven hundred thirty-two thousand, eight hundred seventy-five".