172311587508 has 12 divisors (see below), whose sum is σ = 402060370880. Its totient is φ = 57437195832.

The previous prime is 172311587453. The next prime is 172311587531. The reversal of 172311587508 is 805785113271.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7179649468 + ... + 7179649491.

Almost surely, 2^172311587508 is an apocalyptic number.

It is an amenable number.

172311587508 is an abundant number, since it is smaller than the sum of its proper divisors (229748783372).

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

172311587508 is a wasteful number, since it uses less digits than its factorization.

172311587508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14359298966 (or 14359298964 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 48.

The spelling of 172311587508 in words is "one hundred seventy-two billion, three hundred eleven million, five hundred eighty-seven thousand, five hundred eight".