12578415717 has 16 divisors (see below), whose sum is σ = 19828045440. Its totient is φ = 6939815232.

The previous prime is 12578415713. The next prime is 12578415727. The reversal of 12578415717 is 71751487521.

It is not a de Polignac number, because 12578415717 - 2² = 12578415713 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12578415713) 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, 10326498 + ... + 10327715.

It is an arithmetic number, because the mean of its divisors is an integer number (1239252840).

Almost surely, 2^12578415717 is an apocalyptic number.

It is an amenable number.

12578415717 is a deficient number, since it is larger than the sum of its proper divisors (7249629723).

12578415717 is a wasteful number, since it uses less digits than its factorization.

12578415717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20654252.

The product of its digits is 548800, while the sum is 48.

The spelling of 12578415717 in words is "twelve billion, five hundred seventy-eight million, four hundred fifteen thousand, seven hundred seventeen".