172732370551 has 16 divisors (see below), whose sum is σ = 188358686208. Its totient is φ = 157452422400.

The previous prime is 172732370513. The next prime is 172732370563. The reversal of 172732370551 is 155073237271.

It is not a de Polignac number, because 172732370551 - 2⁷ = 172732370423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172732370498 and 172732370507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172732370501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86281 + ... + 594061.

It is an arithmetic number, because the mean of its divisors is an integer number (11772417888).

Almost surely, 2^172732370551 is an apocalyptic number.

172732370551 is a deficient number, since it is larger than the sum of its proper divisors (15626315657).

172732370551 is a wasteful number, since it uses less digits than its factorization.

172732370551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508122.

The product of its (nonzero) digits is 308700, while the sum is 43.

The spelling of 172732370551 in words is "one hundred seventy-two billion, seven hundred thirty-two million, three hundred seventy thousand, five hundred fifty-one".