172989612731660 has 96 divisors (see below), whose sum is σ = 368703977241600. Its totient is φ = 68169420709632.

The previous prime is 172989612731581. The next prime is 172989612731699. The reversal of 172989612731660 is 66137216989271.

It is a super-2 number, since 2×172989612731660² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3083950574 + ... + 3084006666.

It is an arithmetic number, because the mean of its divisors is an integer number (3840666429600).

Almost surely, 2^{172989612731660} is an apocalyptic number.

172989612731660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172989612731660 is an abundant number, since it is smaller than the sum of its proper divisors (195714364509940).

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

172989612731660 is a wasteful number, since it uses less digits than its factorization.

172989612731660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63927 (or 63925 counting only the distinct ones).

The product of its (nonzero) digits is 82301184, while the sum is 68.

The spelling of 172989612731660 in words is "one hundred seventy-two trillion, nine hundred eighty-nine billion, six hundred twelve million, seven hundred thirty-one thousand, six hundred sixty".