172561272228788 has 48 divisors (see below), whose sum is σ = 307100409739200. Its totient is φ = 84828853056000.

The previous prime is 172561272228757. The next prime is 172561272228859. The reversal of 172561272228788 is 887822272165271.

It is a Smith number, since the sum of its digits (68) coincides with the sum of the digits of its prime factors.

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, 115354238 + ... + 116840586.

It is an arithmetic number, because the mean of its divisors is an integer number (6397925202900).

Almost surely, 2^{172561272228788} is an apocalyptic number.

It is an amenable number.

172561272228788 is a deficient number, since it is larger than the sum of its proper divisors (134539137510412).

172561272228788 is a wasteful number, since it uses less digits than its factorization.

172561272228788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1488128 (or 1488126 counting only the distinct ones).

The product of its digits is 168591360, while the sum is 68.

The spelling of 172561272228788 in words is "one hundred seventy-two trillion, five hundred sixty-one billion, two hundred seventy-two million, two hundred twenty-eight thousand, seven hundred eighty-eight".