12493888779 has 32 divisors (see below), whose sum is σ = 17773240320. Its totient is φ = 7792872192.

The previous prime is 12493888747. The next prime is 12493888831. The reversal of 12493888779 is 97788839421.

12493888779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12493888779 - 2⁵ = 12493888747 is a prime.

It is a super-2 number, since 2×12493888779² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12493888709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 461959 + ... + 488255.

It is an arithmetic number, because the mean of its divisors is an integer number (555413760).

Almost surely, 2^12493888779 is an apocalyptic number.

12493888779 is a deficient number, since it is larger than the sum of its proper divisors (5279351541).

12493888779 is a wasteful number, since it uses less digits than its factorization.

12493888779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26499.

The product of its digits is 48771072, while the sum is 66.

The spelling of 12493888779 in words is "twelve billion, four hundred ninety-three million, eight hundred eighty-eight thousand, seven hundred seventy-nine".