12935478172 has 6 divisors (see below), whose sum is σ = 22637086808. Its totient is φ = 6467739084.

The previous prime is 12935478169. The next prime is 12935478173. The reversal of 12935478172 is 27187453921.

It is a super-3 number, since 3×12935478172³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12935478173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1616934768 + ... + 1616934775.

Almost surely, 2^12935478172 is an apocalyptic number.

It is an amenable number.

12935478172 is a deficient number, since it is larger than the sum of its proper divisors (9701608636).

12935478172 is a wasteful number, since it uses less digits than its factorization.

12935478172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3233869547 (or 3233869545 counting only the distinct ones).

The product of its digits is 846720, while the sum is 49.

The spelling of 12935478172 in words is "twelve billion, nine hundred thirty-five million, four hundred seventy-eight thousand, one hundred seventy-two".