172028867156 has 24 divisors (see below), whose sum is σ = 301607779200. Its totient is φ = 85855331232.

The previous prime is 172028867141. The next prime is 172028867173. The reversal of 172028867156 is 651768820271.

It is a super-2 number, since 2×172028867156² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 172028867098 and 172028867107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6655145 + ... + 6680943.

It is an arithmetic number, because the mean of its divisors is an integer number (12566990800).

Almost surely, 2^172028867156 is an apocalyptic number.

It is an amenable number.

172028867156 is a deficient number, since it is larger than the sum of its proper divisors (129578912044).

172028867156 is a wasteful number, since it uses less digits than its factorization.

172028867156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28823 (or 28821 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 53.

The spelling of 172028867156 in words is "one hundred seventy-two billion, twenty-eight million, eight hundred sixty-seven thousand, one hundred fifty-six".