172366620242 has 4 divisors (see below), whose sum is σ = 258549930366. Its totient is φ = 86183310120.

The previous prime is 172366620233. The next prime is 172366620271. The reversal of 172366620242 is 242026663271.

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., 91209436081 + 81157184161 = 302009^2 + 284881^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 172366620242.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 43091655059 + ... + 43091655062.

Almost surely, 2^172366620242 is an apocalyptic number.

172366620242 is a deficient number, since it is larger than the sum of its proper divisors (86183310124).

172366620242 is an equidigital number, since it uses as much as digits as its factorization.

172366620242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86183310123.

The product of its (nonzero) digits is 290304, while the sum is 41.

The spelling of 172366620242 in words is "one hundred seventy-two billion, three hundred sixty-six million, six hundred twenty thousand, two hundred forty-two".