172381856259 has 16 divisors (see below), whose sum is σ = 230119833600. Its totient is φ = 114782639616.

The previous prime is 172381856249. The next prime is 172381856303. The reversal of 172381856259 is 952658183271.

It is a de Polignac number, because none of the positive numbers 2^k-172381856259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172381856199 and 172381856208.

It is not an unprimeable number, because it can be changed into a prime (172381856239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10555102 + ... + 10571420.

It is an arithmetic number, because the mean of its divisors is an integer number (14382489600).

Almost surely, 2^172381856259 is an apocalyptic number.

172381856259 is a deficient number, since it is larger than the sum of its proper divisors (57737977341).

172381856259 is a wasteful number, since it uses less digits than its factorization.

172381856259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20354.

The product of its digits is 7257600, while the sum is 57.

The spelling of 172381856259 in words is "one hundred seventy-two billion, three hundred eighty-one million, eight hundred fifty-six thousand, two hundred fifty-nine".