13864074639 has 4 divisors (see below), whose sum is σ = 18485432856. Its totient is φ = 9242716424.

The previous prime is 13864074487. The next prime is 13864074691. The reversal of 13864074639 is 93647046831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13864074639 - 2¹⁷ = 13863943567 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13864074591 and 13864074600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13864074439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2310679104 + ... + 2310679109.

It is an arithmetic number, because the mean of its divisors is an integer number (4621358214).

Almost surely, 2^13864074639 is an apocalyptic number.

13864074639 is a deficient number, since it is larger than the sum of its proper divisors (4621358217).

13864074639 is an equidigital number, since it uses as much as digits as its factorization.

13864074639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4621358216.

The product of its (nonzero) digits is 2612736, while the sum is 51.

The spelling of 13864074639 in words is "thirteen billion, eight hundred sixty-four million, seventy-four thousand, six hundred thirty-nine".