12986155079 has 4 divisors (see below), whose sum is σ = 13433953560. Its totient is φ = 12538356600.

The previous prime is 12986155027. The next prime is 12986155111. The reversal of 12986155079 is 97055168921.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12986155079 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 12986155079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12986155019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223899197 + ... + 223899254.

It is an arithmetic number, because the mean of its divisors is an integer number (3358488390).

Almost surely, 2^12986155079 is an apocalyptic number.

12986155079 is a deficient number, since it is larger than the sum of its proper divisors (447798481).

12986155079 is an equidigital number, since it uses as much as digits as its factorization.

12986155079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447798480.

The product of its (nonzero) digits is 1360800, while the sum is 53.

The spelling of 12986155079 in words is "twelve billion, nine hundred eighty-six million, one hundred fifty-five thousand, seventy-nine".