172590021069 has 32 divisors (see below), whose sum is σ = 239405376000. Its totient is φ = 110512995840.

The previous prime is 172590021049. The next prime is 172590021083. The reversal of 172590021069 is 960120095271.

It is not a de Polignac number, because 172590021069 - 2²⁵ = 172556466637 is a prime.

It is a super-2 number, since 2×172590021069² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 172590021069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172590021049) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3365787 + ... + 3416679.

It is an arithmetic number, because the mean of its divisors is an integer number (7481418000).

Almost surely, 2^172590021069 is an apocalyptic number.

It is an amenable number.

172590021069 is a deficient number, since it is larger than the sum of its proper divisors (66815354931).

172590021069 is a wasteful number, since it uses less digits than its factorization.

172590021069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51365.

The product of its (nonzero) digits is 68040, while the sum is 42.

The spelling of 172590021069 in words is "one hundred seventy-two billion, five hundred ninety million, twenty-one thousand, sixty-nine".