12509597558 has 8 divisors (see below), whose sum is σ = 19580239728. Its totient is φ = 5982850984.

The previous prime is 12509597519. The next prime is 12509597561. The reversal of 12509597558 is 85579590521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135973841 + ... + 135973932.

It is an arithmetic number, because the mean of its divisors is an integer number (2447529966).

Almost surely, 2^12509597558 is an apocalyptic number.

12509597558 is a deficient number, since it is larger than the sum of its proper divisors (7070642170).

12509597558 is a wasteful number, since it uses less digits than its factorization.

12509597558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271947798.

The product of its (nonzero) digits is 5670000, while the sum is 56.

The spelling of 12509597558 in words is "twelve billion, five hundred nine million, five hundred ninety-seven thousand, five hundred fifty-eight".