12509028349 has 16 divisors (see below), whose sum is σ = 13538016000. Its totient is φ = 11515405824.

The previous prime is 12509028341. The next prime is 12509028397. The reversal of 12509028349 is 94382090521.

It is a cyclic number.

It is not a de Polignac number, because 12509028349 - 2³ = 12509028341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12509028341) 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, 100177 + ... + 187225.

It is an arithmetic number, because the mean of its divisors is an integer number (846126000).

Almost surely, 2^12509028349 is an apocalyptic number.

It is an amenable number.

12509028349 is a deficient number, since it is larger than the sum of its proper divisors (1028987651).

12509028349 is a wasteful number, since it uses less digits than its factorization.

12509028349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87252.

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 12509028349 in words is "twelve billion, five hundred nine million, twenty-eight thousand, three hundred forty-nine".