872011018820 has 24 divisors (see below), whose sum is σ = 1927603305600. Its totient is φ = 330446280672.

The previous prime is 872011018771. The next prime is 872011018859. The reversal of 872011018820 is 28810110278.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1147382540 + ... + 1147383299.

It is an arithmetic number, because the mean of its divisors is an integer number (80316804400).

Almost surely, 2^872011018820 is an apocalyptic number.

It is an amenable number.

872011018820 is an abundant number, since it is smaller than the sum of its proper divisors (1055592286780).

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

872011018820 is a wasteful number, since it uses less digits than its factorization.

872011018820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2294765867 (or 2294765865 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 38.

The spelling of 872011018820 in words is "eight hundred seventy-two billion, eleven million, eighteen thousand, eight hundred twenty".