12657446433 has 12 divisors (see below), whose sum is σ = 18286971300. Its totient is φ = 8436454656.

The previous prime is 12657446419. The next prime is 12657446479. The reversal of 12657446433 is 33464475621.

12657446433 is a `hidden beast` number, since 1 + 2 + 6 + 574 + 46 + 4 + 33 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12340321569 + 317124864 = 111087^2 + 17808^2 .

It is not a de Polignac number, because 12657446433 - 2⁸ = 12657446177 is a prime.

It is a super-3 number, since 3×12657446433³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (12657446833) 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, 109416 + ... + 193097.

It is an arithmetic number, because the mean of its divisors is an integer number (1523914275).

Almost surely, 2^12657446433 is an apocalyptic number.

It is an amenable number.

12657446433 is a deficient number, since it is larger than the sum of its proper divisors (5629524867).

12657446433 is a wasteful number, since it uses less digits than its factorization.

12657446433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307168 (or 307165 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 45.

The spelling of 12657446433 in words is "twelve billion, six hundred fifty-seven million, four hundred forty-six thousand, four hundred thirty-three".