12521606189 has 16 divisors (see below), whose sum is σ = 12960319680. Its totient is φ = 12089520000.

The previous prime is 12521606183. The next prime is 12521606197. The reversal of 12521606189 is 98160612521.

It is a cyclic number.

It is not a de Polignac number, because 12521606189 - 2⁸ = 12521605933 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12521606183) 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, 6483554 + ... + 6485484.

It is an arithmetic number, because the mean of its divisors is an integer number (810019980).

Almost surely, 2^12521606189 is an apocalyptic number.

It is an amenable number.

12521606189 is a deficient number, since it is larger than the sum of its proper divisors (438713491).

12521606189 is a wasteful number, since it uses less digits than its factorization.

12521606189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3532.

The product of its (nonzero) digits is 51840, while the sum is 41.

The spelling of 12521606189 in words is "twelve billion, five hundred twenty-one million, six hundred six thousand, one hundred eighty-nine".