12791338385 has 16 divisors (see below), whose sum is σ = 17602292736. Its totient is φ = 8741260608.

The previous prime is 12791338369. The next prime is 12791338387. The reversal of 12791338385 is 58383319721.

It is a cyclic number.

It is not a de Polignac number, because 12791338385 - 2⁴ = 12791338369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12791338387) 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, 613409 + ... + 633918.

It is an arithmetic number, because the mean of its divisors is an integer number (1100143296).

Almost surely, 2^12791338385 is an apocalyptic number.

It is an amenable number.

12791338385 is a deficient number, since it is larger than the sum of its proper divisors (4810954351).

12791338385 is a wasteful number, since it uses less digits than its factorization.

12791338385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247632.

The product of its digits is 1088640, while the sum is 50.

The spelling of 12791338385 in words is "twelve billion, seven hundred ninety-one million, three hundred thirty-eight thousand, three hundred eighty-five".