172106998722 has 112 divisors (see below), whose sum is σ = 398220017472. Its totient is φ = 55720910880.

The previous prime is 172106998709. The next prime is 172106998769. The reversal of 172106998722 is 227899601271.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 34900597 + ... + 34905527.

Almost surely, 2^172106998722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172106998722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199110008736).

172106998722 is an abundant number, since it is smaller than the sum of its proper divisors (226113018750).

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

172106998722 is an equidigital number, since it uses as much as digits as its factorization.

172106998722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5635 (or 5620 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The spelling of 172106998722 in words is "one hundred seventy-two billion, one hundred six million, nine hundred ninety-eight thousand, seven hundred twenty-two".