12489513844 has 6 divisors (see below), whose sum is σ = 21856649234. Its totient is φ = 6244756920.

The previous prime is 12489513791. The next prime is 12489513877. The reversal of 12489513844 is 44831598421.

It can be written as a sum of positive squares in only one way, i.e., 6945222244 + 5544291600 = 83338^2 + 74460^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1561189227 + ... + 1561189234.

Almost surely, 2^12489513844 is an apocalyptic number.

It is an amenable number.

12489513844 is a deficient number, since it is larger than the sum of its proper divisors (9367135390).

12489513844 is a wasteful number, since it uses less digits than its factorization.

12489513844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3122378465 (or 3122378463 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 49.

The spelling of 12489513844 in words is "twelve billion, four hundred eighty-nine million, five hundred thirteen thousand, eight hundred forty-four".