12137038644 has 24 divisors (see below), whose sum is σ = 28321537888. Its totient is φ = 4045425120.

The previous prime is 12137038631. The next prime is 12137038649. The reversal of 12137038644 is 44683073121.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12137038649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 362334 + ... + 394410.

Almost surely, 2^12137038644 is an apocalyptic number.

It is an amenable number.

12137038644 is an abundant number, since it is smaller than the sum of its proper divisors (16184499244).

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

12137038644 is a wasteful number, since it uses less digits than its factorization.

12137038644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63615 (or 63613 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The spelling of 12137038644 in words is "twelve billion, one hundred thirty-seven million, thirty-eight thousand, six hundred forty-four".