172166240502 has 40 divisors (see below), whose sum is σ = 386289801216. Its totient is φ = 57312895248.

The previous prime is 172166240497. The next prime is 172166240557. The reversal of 172166240502 is 205042661271.

It is a happy number.

172166240502 is a `hidden beast` number, since 1 + 7 + 21 + 6 + 624 + 0 + 5 + 0 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 579318 + ... + 824585.

Almost surely, 2^172166240502 is an apocalyptic number.

172166240502 is an abundant number, since it is smaller than the sum of its proper divisors (214123560714).

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

172166240502 is a wasteful number, since it uses less digits than its factorization.

172166240502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404674 (or 1404665 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 172166240502 in words is "one hundred seventy-two billion, one hundred sixty-six million, two hundred forty thousand, five hundred two".