172357351887 has 128 divisors (see below), whose sum is σ = 293145149440. Its totient is φ = 87856513920.

The previous prime is 172357351847. The next prime is 172357351913. The reversal of 172357351887 is 788153753271.

It is not a de Polignac number, because 172357351887 - 2⁶ = 172357351823 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172357351847) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 195194748 + ... + 195195630.

It is an arithmetic number, because the mean of its divisors is an integer number (2290196480).

Almost surely, 2^172357351887 is an apocalyptic number.

172357351887 is a deficient number, since it is larger than the sum of its proper divisors (120787797553).

172357351887 is a wasteful number, since it uses less digits than its factorization.

172357351887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353.

The product of its digits is 9878400, while the sum is 57.

The spelling of 172357351887 in words is "one hundred seventy-two billion, three hundred fifty-seven million, three hundred fifty-one thousand, eight hundred eighty-seven".