172386871885 has 16 divisors (see below), whose sum is σ = 213550917120. Its totient is φ = 133452285120.

The previous prime is 172386871879. The next prime is 172386871931. The reversal of 172386871885 is 588178683271.

It is a de Polignac number, because none of the positive numbers 2^k-172386871885 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3593719 + ... + 3641371.

It is an arithmetic number, because the mean of its divisors is an integer number (13346932320).

Almost surely, 2^172386871885 is an apocalyptic number.

It is an amenable number.

172386871885 is a deficient number, since it is larger than the sum of its proper divisors (41164045235).

172386871885 is a wasteful number, since it uses less digits than its factorization.

172386871885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71028.

The product of its digits is 36126720, while the sum is 64.

The spelling of 172386871885 in words is "one hundred seventy-two billion, three hundred eighty-six million, eight hundred seventy-one thousand, eight hundred eighty-five".