872166783880 has 96 divisors (see below), whose sum is σ = 2344459555800. Its totient is φ = 290946733056.

The previous prime is 872166783757. The next prime is 872166783913. The reversal of 872166783880 is 88387661278.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 819636894244 + 52529889636 = 905338^2 + 229194^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5940765 + ... + 6085804.

Almost surely, 2^872166783880 is an apocalyptic number.

It is an amenable number.

872166783880 is an abundant number, since it is smaller than the sum of its proper divisors (1472292771920).

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

872166783880 is a wasteful number, since it uses less digits than its factorization.

872166783880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12026631 (or 12026620 counting only the distinct ones).

The product of its (nonzero) digits is 43352064, while the sum is 64.

The spelling of 872166783880 in words is "eight hundred seventy-two billion, one hundred sixty-six million, seven hundred eighty-three thousand, eight hundred eighty".