172384979120639 has 16 divisors (see below), whose sum is σ = 177126258038400. Its totient is φ = 167648044621824.

The previous prime is 172384979120587. The next prime is 172384979120659. The reversal of 172384979120639 is 936021979483271.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172384979120639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172384979120659) 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, 772059914 + ... + 772283160.

It is an arithmetic number, because the mean of its divisors is an integer number (11070391127400).

Almost surely, 2^{172384979120639} is an apocalyptic number.

172384979120639 is a deficient number, since it is larger than the sum of its proper divisors (4741278917761).

172384979120639 is a wasteful number, since it uses less digits than its factorization.

172384979120639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232882.

The product of its (nonzero) digits is 246903552, while the sum is 71.

The spelling of 172384979120639 in words is "one hundred seventy-two trillion, three hundred eighty-four billion, nine hundred seventy-nine million, one hundred twenty thousand, six hundred thirty-nine".