12594328509 has 16 divisors (see below), whose sum is σ = 19710044288. Its totient is φ = 7002251712.

The previous prime is 12594328493. The next prime is 12594328519. The reversal of 12594328509 is 90582349521.

It is a happy number.

It is not a de Polignac number, because 12594328509 - 2⁴ = 12594328493 is a prime.

It is a super-2 number, since 2×12594328509² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12594328519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8103682 + ... + 8105235.

It is an arithmetic number, because the mean of its divisors is an integer number (1231877768).

Almost surely, 2^12594328509 is an apocalyptic number.

It is an amenable number.

12594328509 is a deficient number, since it is larger than the sum of its proper divisors (7115715779).

12594328509 is a wasteful number, since it uses less digits than its factorization.

12594328509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16208964.

The product of its (nonzero) digits is 777600, while the sum is 48.

The spelling of 12594328509 in words is "twelve billion, five hundred ninety-four million, three hundred twenty-eight thousand, five hundred nine".