172381856208 has 20 divisors (see below), whose sum is σ = 445319795328. Its totient is φ = 57460618720.

The previous prime is 172381856201. The next prime is 172381856233. The reversal of 172381856208 is 802658183271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172381856201) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1795644288 + ... + 1795644383.

Almost surely, 2^172381856208 is an apocalyptic number.

It is an amenable number.

172381856208 is an abundant number, since it is smaller than the sum of its proper divisors (272937939120).

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

172381856208 is a wasteful number, since it uses less digits than its factorization.

172381856208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3591288682 (or 3591288676 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 51.

The spelling of 172381856208 in words is "one hundred seventy-two billion, three hundred eighty-one million, eight hundred fifty-six thousand, two hundred eight".