12815593109 has 4 divisors (see below), whose sum is σ = 13980647040. Its totient is φ = 11650539180.

The previous prime is 12815593073. The next prime is 12815593111. The reversal of 12815593109 is 90139551821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12815593109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12815593109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12815593159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 582526949 + ... + 582526970.

It is an arithmetic number, because the mean of its divisors is an integer number (3495161760).

Almost surely, 2^12815593109 is an apocalyptic number.

It is an amenable number.

12815593109 is a deficient number, since it is larger than the sum of its proper divisors (1165053931).

12815593109 is a wasteful number, since it uses less digits than its factorization.

12815593109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165053930.

The product of its (nonzero) digits is 97200, while the sum is 44.

The spelling of 12815593109 in words is "twelve billion, eight hundred fifteen million, five hundred ninety-three thousand, one hundred nine".