12687319044 has 27 divisors (see below), whose sum is σ = 32072431573. Its totient is φ = 4228881072.

The previous prime is 12687319031. The next prime is 12687319049. The reversal of 12687319044 is 44091378621.

The square root of 12687319044 is 112638.

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

It can be written as a sum of positive squares in only one way, i.e., 12676508100 + 10810944 = 112590^2 + 3288^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12687319049) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 666442 + ... + 685214.

Almost surely, 2^12687319044 is an apocalyptic number.

12687319044 is the 112638-th square number.

It is an amenable number.

12687319044 is an abundant number, since it is smaller than the sum of its proper divisors (19385112529).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12687319044 is an frugal number, since it uses more digits than its factorization.

12687319044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37556 (or 18778 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 12687319044 in words is "twelve billion, six hundred eighty-seven million, three hundred nineteen thousand, forty-four".