172789289892 has 72 divisors (see below), whose sum is σ = 463952990592. Its totient is φ = 54034041600.

The previous prime is 172789289833. The next prime is 172789289917. The reversal of 172789289892 is 298982987271.

It is a super-2 number, since 2×172789289892² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 172789289892.

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 23 ways as a sum of consecutive naturals, for example, 263584 + ... + 644247.

It is an arithmetic number, because the mean of its divisors is an integer number (6443791536).

Almost surely, 2^172789289892 is an apocalyptic number.

172789289892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

172789289892 is an abundant number, since it is smaller than the sum of its proper divisors (291163700700).

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

172789289892 is a wasteful number, since it uses less digits than its factorization.

172789289892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908169 (or 908164 counting only the distinct ones).

The product of its digits is 146313216, while the sum is 72.

The spelling of 172789289892 in words is "one hundred seventy-two billion, seven hundred eighty-nine million, two hundred eighty-nine thousand, eight hundred ninety-two".