172127830665 has 32 divisors (see below), whose sum is σ = 314787951360. Its totient is φ = 78677028864.

The previous prime is 172127830657. The next prime is 172127830703. The reversal of 172127830665 is 566038721271.

It is not a de Polignac number, because 172127830665 - 2³ = 172127830657 is a prime.

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, 762097 + ... + 961793.

It is an arithmetic number, because the mean of its divisors is an integer number (9837123480).

Almost surely, 2^172127830665 is an apocalyptic number.

172127830665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172127830665 is a deficient number, since it is larger than the sum of its proper divisors (142660120695).

172127830665 is a wasteful number, since it uses less digits than its factorization.

172127830665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207921.

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 172127830665 in words is "one hundred seventy-two billion, one hundred twenty-seven million, eight hundred thirty thousand, six hundred sixty-five".