172999194768 has 100 divisors (see below), whose sum is σ = 504652938240. Its totient is φ = 57212277696.

The previous prime is 172999194721. The next prime is 172999194787. The reversal of 172999194768 is 867491999271.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 172999194696 and 172999194705.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 360948 + ... + 690131.

Almost surely, 2^172999194768 is an apocalyptic number.

172999194768 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

172999194768 is an abundant number, since it is smaller than the sum of its proper divisors (331653743472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172999194768 is a wasteful number, since it uses less digits than its factorization.

172999194768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051226 (or 1051211 counting only the distinct ones).

The product of its digits is 123451776, while the sum is 72.

The spelling of 172999194768 in words is "one hundred seventy-two billion, nine hundred ninety-nine million, one hundred ninety-four thousand, seven hundred sixty-eight".