172316026557 has 12 divisors (see below), whose sum is σ = 251103591804. Its totient is φ = 113860736640.

The previous prime is 172316026541. The next prime is 172316026607. The reversal of 172316026557 is 755620613271.

It is a happy number.

172316026557 is a `hidden beast` number, since 1 + 7 + 2 + 31 + 60 + 2 + 6 + 557 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7712176761 + 164603849796 = 87819^2 + 405714^2 .

It is not a de Polignac number, because 172316026557 - 2⁴ = 172316026541 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172316026357) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84716794 + ... + 84718827.

It is an arithmetic number, because the mean of its divisors is an integer number (20925299317).

Almost surely, 2^172316026557 is an apocalyptic number.

It is an amenable number.

172316026557 is a deficient number, since it is larger than the sum of its proper divisors (78787565247).

172316026557 is a wasteful number, since it uses less digits than its factorization.

172316026557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169435740 (or 169435737 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 45.

The spelling of 172316026557 in words is "one hundred seventy-two billion, three hundred sixteen million, twenty-six thousand, five hundred fifty-seven".