12897478507 has 16 divisors (see below), whose sum is σ = 13112075520. Its totient is φ = 12684924000.

The previous prime is 12897478499. The next prime is 12897478547. The reversal of 12897478507 is 70587479821.

It is a cyclic number.

It is not a de Polignac number, because 12897478507 - 2³ = 12897478499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12897478547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14033794 + ... + 14034712.

It is an arithmetic number, because the mean of its divisors is an integer number (819504720).

Almost surely, 2^12897478507 is an apocalyptic number.

12897478507 is a deficient number, since it is larger than the sum of its proper divisors (214597013).

12897478507 is a wasteful number, since it uses less digits than its factorization.

12897478507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1794.

The product of its (nonzero) digits is 7902720, while the sum is 58.

The spelling of 12897478507 in words is "twelve billion, eight hundred ninety-seven million, four hundred seventy-eight thousand, five hundred seven".