12013694449 has 9 divisors (see below), whose sum is σ = 12304407243. Its totient is φ = 11729702712.

The previous prime is 12013694437. The next prime is 12013694477. The reversal of 12013694449 is 94449631021.

The square root of 12013694449 is 109607.

It is a perfect power (a square), and thus also a powerful number.

12013694449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11107684449 + 906010000 = 105393^2 + 30100^2 .

It is not a de Polignac number, because 12013694449 - 2⁷ = 12013694321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12013691449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4711827 + ... + 4714375.

Almost surely, 2^12013694449 is an apocalyptic number.

12013694449 is the 109607-th square number.

12013694449 is the 54804-th centered octagonal number.

It is an amenable number.

12013694449 is a deficient number, since it is larger than the sum of its proper divisors (290712794).

12013694449 is an frugal number, since it uses more digits than its factorization.

12013694449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5184 (or 2592 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 12013694449 in words is "twelve billion, thirteen million, six hundred ninety-four thousand, four hundred forty-nine".