12591779464 has 16 divisors (see below), whose sum is σ = 25755912720. Its totient is φ = 5723536080.

The previous prime is 12591779449. The next prime is 12591779467. The reversal of 12591779464 is 46497719521.

12591779464 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12591779467) 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 3 ways as a sum of consecutive naturals, for example, 71544114 + ... + 71544289.

It is an arithmetic number, because the mean of its divisors is an integer number (1609744545).

Almost surely, 2^12591779464 is an apocalyptic number.

It is an amenable number.

12591779464 is an abundant number, since it is smaller than the sum of its proper divisors (13164133256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12591779464 is a wasteful number, since it uses less digits than its factorization.

12591779464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143088420 (or 143088416 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 55.

The spelling of 12591779464 in words is "twelve billion, five hundred ninety-one million, seven hundred seventy-nine thousand, four hundred sixty-four".