172356668340 has 24 divisors (see below), whose sum is σ = 482598671520. Its totient is φ = 45961778208.

The previous prime is 172356668311. The next prime is 172356668353. The reversal of 172356668340 is 43866653271.

It is a super-2 number, since 2×172356668340² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1436305510 + ... + 1436305629.

It is an arithmetic number, because the mean of its divisors is an integer number (20108277980).

Almost surely, 2^172356668340 is an apocalyptic number.

172356668340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172356668340 is an abundant number, since it is smaller than the sum of its proper divisors (310242003180).

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

172356668340 is a wasteful number, since it uses less digits than its factorization.

172356668340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2872611151 (or 2872611149 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 51.

The spelling of 172356668340 in words is "one hundred seventy-two billion, three hundred fifty-six million, six hundred sixty-eight thousand, three hundred forty".