172072904425 has 12 divisors (see below), whose sum is σ = 213375596560. Its totient is φ = 137654971920.

The previous prime is 172072904413. The next prime is 172072904431. The reversal of 172072904425 is 524409270271.

It is a de Polignac number, because none of the positive numbers 2^k-172072904425 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1753306 + ... + 1848844.

Almost surely, 2^172072904425 is an apocalyptic number.

It is an amenable number.

172072904425 is a deficient number, since it is larger than the sum of its proper divisors (41302692135).

172072904425 is an equidigital number, since it uses as much as digits as its factorization.

172072904425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167592 (or 167587 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 43.

The spelling of 172072904425 in words is "one hundred seventy-two billion, seventy-two million, nine hundred four thousand, four hundred twenty-five".