172112823839 has 16 divisors (see below), whose sum is σ = 191014809216. Its totient is φ = 153764503200.

The previous prime is 172112823821. The next prime is 172112823889. The reversal of 172112823839 is 938328211271.

It is a happy number.

It is not a de Polignac number, because 172112823839 - 2⁸ = 172112823583 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172112823793 and 172112823802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172112823889) 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, 32924 + ... + 587630.

It is an arithmetic number, because the mean of its divisors is an integer number (11938425576).

Almost surely, 2^172112823839 is an apocalyptic number.

172112823839 is a deficient number, since it is larger than the sum of its proper divisors (18901985377).

172112823839 is a wasteful number, since it uses less digits than its factorization.

172112823839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555206.

The product of its digits is 290304, while the sum is 47.

The spelling of 172112823839 in words is "one hundred seventy-two billion, one hundred twelve million, eight hundred twenty-three thousand, eight hundred thirty-nine".