172123615515753 has 48 divisors (see below), whose sum is σ = 274186026756096. Its totient is φ = 103179814917120.

The previous prime is 172123615515713. The next prime is 172123615515757. The reversal of 172123615515753 is 357515516321271.

172123615515753 is a `hidden beast` number, since 1 + 7 + 2 + 1 + 2 + 3 + 6 + 15 + 51 + 575 + 3 = 666.

It is not a de Polignac number, because 172123615515753 - 2²⁴ = 172123598738537 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 172123615515753.

It is not an unprimeable number, because it can be changed into a prime (172123615515757) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10580751 + ... + 21358827.

It is an arithmetic number, because the mean of its divisors is an integer number (5712208890752).

Almost surely, 2^{172123615515753} is an apocalyptic number.

It is an amenable number.

172123615515753 is a deficient number, since it is larger than the sum of its proper divisors (102062411240343).

172123615515753 is a wasteful number, since it uses less digits than its factorization.

172123615515753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10779854 (or 10779851 counting only the distinct ones).

The product of its digits is 6615000, while the sum is 54.

The spelling of 172123615515753 in words is "one hundred seventy-two trillion, one hundred twenty-three billion, six hundred fifteen million, five hundred fifteen thousand, seven hundred fifty-three".