172112945277 has 16 divisors (see below), whose sum is σ = 282441756800. Its totient is φ = 90784850112.

The previous prime is 172112945239. The next prime is 172112945309. The reversal of 172112945277 is 772549211271.

It is a de Polignac number, because none of the positive numbers 2^k-172112945277 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172112945227) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 315224902 + ... + 315225447.

It is an arithmetic number, because the mean of its divisors is an integer number (17652609800).

Almost surely, 2^172112945277 is an apocalyptic number.

It is an amenable number.

172112945277 is a deficient number, since it is larger than the sum of its proper divisors (110328811523).

172112945277 is a wasteful number, since it uses less digits than its factorization.

172112945277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630450372.

The product of its digits is 493920, while the sum is 48.

The spelling of 172112945277 in words is "one hundred seventy-two billion, one hundred twelve million, nine hundred forty-five thousand, two hundred seventy-seven".