12591579220 has 24 divisors (see below), whose sum is σ = 28846163808. Its totient is φ = 4578756000.

The previous prime is 12591579157. The next prime is 12591579229. The reversal of 12591579220 is 2297519521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12591579229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28617006 + ... + 28617445.

It is an arithmetic number, because the mean of its divisors is an integer number (1201923492).

Almost surely, 2^12591579220 is an apocalyptic number.

12591579220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12591579220 is an abundant number, since it is smaller than the sum of its proper divisors (16254584588).

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

12591579220 is a wasteful number, since it uses less digits than its factorization.

12591579220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57234471 (or 57234469 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 43.

The spelling of 12591579220 in words is "twelve billion, five hundred ninety-one million, five hundred seventy-nine thousand, two hundred twenty".