811881160 has 16 divisors (see below), whose sum is σ = 1826732700. Its totient is φ = 324752448.

The previous prime is 811881137. The next prime is 811881167. The reversal of 811881160 is 61188118.

It can be written as a sum of positive squares in 2 ways, for example, as 756140004 + 55741156 = 27498^2 + 7466^2 .

It is not an unprimeable number, because it can be changed into a prime (811881167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10148475 + ... + 10148554.

Almost surely, 2^811881160 is an apocalyptic number.

It is an amenable number.

811881160 is an abundant number, since it is smaller than the sum of its proper divisors (1014851540).

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

811881160 is a wasteful number, since it uses less digits than its factorization.

811881160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20297040 (or 20297036 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 34.

The square root of 811881160 is about 28493.5283880393. The cubic root of 811881160 is about 932.8908236783.

The spelling of 811881160 in words is "eight hundred eleven million, eight hundred eighty-one thousand, one hundred sixty".