172381856199 has 32 divisors (see below), whose sum is σ = 275305512960. Its totient is φ = 93806008032.

The previous prime is 172381856189. The next prime is 172381856201. The reversal of 172381856199 is 991658183271.

It is not a de Polignac number, because 172381856199 - 2⁵ = 172381856167 is a prime.

It is a super-2 number, since 2×172381856199² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172381856159) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 676479 + ... + 895760.

It is an arithmetic number, because the mean of its divisors is an integer number (8603297280).

Almost surely, 2^172381856199 is an apocalyptic number.

172381856199 is a deficient number, since it is larger than the sum of its proper divisors (102923656761).

172381856199 is a wasteful number, since it uses less digits than its factorization.

172381856199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572499.

The product of its digits is 6531840, while the sum is 60.

The spelling of 172381856199 in words is "one hundred seventy-two billion, three hundred eighty-one million, eight hundred fifty-six thousand, one hundred ninety-nine".