999989267882172 has 48 divisors (see below), whose sum is σ = 2471380059939840. Its totient is φ = 313618207156992.

The previous prime is 999989267882167. The next prime is 999989267882191. The reversal of 999989267882172 is 271288762989999.

999989267882172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 999989267882172.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 811227148 + ... + 812458899.

It is an arithmetic number, because the mean of its divisors is an integer number (51487084582080).

Almost surely, 2^{999989267882172} is an apocalyptic number.

It is an amenable number.

999989267882172 is an abundant number, since it is smaller than the sum of its proper divisors (1471390792057668).

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

999989267882172 is a wasteful number, since it uses less digits than its factorization.

999989267882172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623689090 (or 1623689088 counting only the distinct ones).

The product of its digits is 71108222976, while the sum is 96.

The spelling of 999989267882172 in words is "nine hundred ninety-nine trillion, nine hundred eighty-nine billion, two hundred sixty-seven million, eight hundred eighty-two thousand, one hundred seventy-two".