13386431644 has 12 divisors (see below), whose sum is σ = 23537281768. Its totient is φ = 6661494000.

The previous prime is 13386431633. The next prime is 13386431683. The reversal of 13386431644 is 44613468331.

It is a self number, because there is not a number n which added to its sum of digits gives 13386431644.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7929507 + ... + 7931194.

Almost surely, 2^13386431644 is an apocalyptic number.

It is an amenable number.

13386431644 is a deficient number, since it is larger than the sum of its proper divisors (10150850124).

13386431644 is a wasteful number, since it uses less digits than its factorization.

13386431644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15860916 (or 15860914 counting only the distinct ones).

The product of its digits is 497664, while the sum is 43.

Adding to 13386431644 its reverse (44613468331), we get a palindrome (57999899975).

The spelling of 13386431644 in words is "thirteen billion, three hundred eighty-six million, four hundred thirty-one thousand, six hundred forty-four".