13887638777639 has 8 divisors (see below), whose sum is σ = 15170541916032. Its totient is φ = 12608134059640.

The previous prime is 13887638777633. The next prime is 13887638777647. The reversal of 13887638777639 is 93677783678831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13887638777639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13887638777633) 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, 849596549 + ... + 849612894.

It is an arithmetic number, because the mean of its divisors is an integer number (1896317739504).

Almost surely, 2^{13887638777639} is an apocalyptic number.

13887638777639 is a deficient number, since it is larger than the sum of its proper divisors (1282903138393).

13887638777639 is a wasteful number, since it uses less digits than its factorization.

13887638777639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1699210197.

The product of its digits is 10754021376, while the sum is 83.

The spelling of 13887638777639 in words is "thirteen trillion, eight hundred eighty-seven billion, six hundred thirty-eight million, seven hundred seventy-seven thousand, six hundred thirty-nine".