172113645 has 16 divisors (see below), whose sum is σ = 300416832. Its totient is φ = 83448960.

The previous prime is 172113607. The next prime is 172113653. The reversal of 172113645 is 546311271.

It is not a de Polignac number, because 172113645 - 2¹⁸ = 171851501 is a prime.

It is a super-3 number, since 3×172113645³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 521392 + ... + 521721.

It is an arithmetic number, because the mean of its divisors is an integer number (18776052).

Almost surely, 2^172113645 is an apocalyptic number.

172113645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172113645 is a deficient number, since it is larger than the sum of its proper divisors (128303187).

172113645 is a wasteful number, since it uses less digits than its factorization.

172113645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043132.

The product of its digits is 5040, while the sum is 30.

The square root of 172113645 is about 13119.2090081681. The cubic root of 172113645 is about 556.2522329583.

The spelling of 172113645 in words is "one hundred seventy-two million, one hundred thirteen thousand, six hundred forty-five".