172252992639 has 64 divisors (see below), whose sum is σ = 299108597760. Its totient is φ = 85625527680.

The previous prime is 172252992631. The next prime is 172252992641. The reversal of 172252992639 is 936299252271.

It is a happy number.

It is not a de Polignac number, because 172252992639 - 2³ = 172252992631 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172252992631) 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 63 ways as a sum of consecutive naturals, for example, 903784 + ... + 1077650.

It is an arithmetic number, because the mean of its divisors is an integer number (4673571840).

Almost surely, 2^172252992639 is an apocalyptic number.

172252992639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

172252992639 is a deficient number, since it is larger than the sum of its proper divisors (126855605121).

172252992639 is a wasteful number, since it uses less digits than its factorization.

172252992639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174100.

The product of its digits is 7348320, while the sum is 57.

The spelling of 172252992639 in words is "one hundred seventy-two billion, two hundred fifty-two million, nine hundred ninety-two thousand, six hundred thirty-nine".