172145366275 has 24 divisors (see below), whose sum is σ = 218352373760. Its totient is φ = 134592464160.

The previous prime is 172145366269. The next prime is 172145366317. The reversal of 172145366275 is 572663541271.

It is not a de Polignac number, because 172145366275 - 2²³ = 172136977667 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 191895 + ... + 617344.

Almost surely, 2^172145366275 is an apocalyptic number.

172145366275 is a deficient number, since it is larger than the sum of its proper divisors (46207007485).

172145366275 is a wasteful number, since it uses less digits than its factorization.

172145366275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809443 (or 809438 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 49.

The spelling of 172145366275 in words is "one hundred seventy-two billion, one hundred forty-five million, three hundred sixty-six thousand, two hundred seventy-five".