172228912461 has 12 divisors (see below), whose sum is σ = 252488157792. Its totient is φ = 113105554056.

The previous prime is 172228912441. The next prime is 172228912477. The reversal of 172228912461 is 164219822271.

172228912461 is a `hidden beast` number, since 172 + 2 + 2 + 8 + 9 + 12 + 461 = 666.

It is not a de Polignac number, because 172228912461 - 2²⁵ = 172195358029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172228912441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142809441 + ... + 142810646.

It is an arithmetic number, because the mean of its divisors is an integer number (21040679816).

Almost surely, 2^172228912461 is an apocalyptic number.

It is an amenable number.

172228912461 is a deficient number, since it is larger than the sum of its proper divisors (80259245331).

172228912461 is a wasteful number, since it uses less digits than its factorization.

172228912461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285620160 (or 285620157 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The spelling of 172228912461 in words is "one hundred seventy-two billion, two hundred twenty-eight million, nine hundred twelve thousand, four hundred sixty-one".