172135504915 has 16 divisors (see below), whose sum is σ = 226172560896. Its totient is φ = 124727493600.

The previous prime is 172135504907. The next prime is 172135504927. The reversal of 172135504915 is 519405531271.

It is not a de Polignac number, because 172135504915 - 2³ = 172135504907 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5759517 + ... + 5789326.

It is an arithmetic number, because the mean of its divisors is an integer number (14135785056).

Almost surely, 2^172135504915 is an apocalyptic number.

172135504915 is a deficient number, since it is larger than the sum of its proper divisors (54037055981).

172135504915 is a wasteful number, since it uses less digits than its factorization.

172135504915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11549130.

The product of its (nonzero) digits is 189000, while the sum is 43.

The spelling of 172135504915 in words is "one hundred seventy-two billion, one hundred thirty-five million, five hundred four thousand, nine hundred fifteen".