13638886757 has 4 divisors (see below), whose sum is σ = 14007505356. Its totient is φ = 13270268160.

The previous prime is 13638886739. The next prime is 13638886763. The reversal of 13638886757 is 75768883631.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4804014721 + 8834872036 = 69311^2 + 93994^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13638886757 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13638886757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13638886777) 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, 184309244 + ... + 184309317.

It is an arithmetic number, because the mean of its divisors is an integer number (3501876339).

Almost surely, 2^13638886757 is an apocalyptic number.

It is an amenable number.

13638886757 is a deficient number, since it is larger than the sum of its proper divisors (368618599).

13638886757 is an equidigital number, since it uses as much as digits as its factorization.

13638886757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368618598.

The product of its digits is 40642560, while the sum is 62.

The spelling of 13638886757 in words is "thirteen billion, six hundred thirty-eight million, eight hundred eighty-six thousand, seven hundred fifty-seven".