172942179994 has 4 divisors (see below), whose sum is σ = 259413269994. Its totient is φ = 86471089996.

The previous prime is 172942179979. The next prime is 172942180039. The reversal of 172942179994 is 499971249271.

It is a happy number.

172942179994 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 131070789369 + 41871390625 = 362037^2 + 204625^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43235544997 + ... + 43235545000.

Almost surely, 2^172942179994 is an apocalyptic number.

172942179994 is a deficient number, since it is larger than the sum of its proper divisors (86471090000).

172942179994 is an equidigital number, since it uses as much as digits as its factorization.

172942179994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86471089999.

The product of its digits is 20575296, while the sum is 64.

The spelling of 172942179994 in words is "one hundred seventy-two billion, nine hundred forty-two million, one hundred seventy-nine thousand, nine hundred ninety-four".