13638457727 has 4 divisors (see below), whose sum is σ = 13668042696. Its totient is φ = 13608872760.

The previous prime is 13638457709. The next prime is 13638457741. The reversal of 13638457727 is 72775483631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72775483631 = 37 ⋅1966904963.

It is a cyclic number.

It is not a de Polignac number, because 13638457727 - 2¹⁴ = 13638441343 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 (13631457727) 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, 14791793 + ... + 14792714.

It is an arithmetic number, because the mean of its divisors is an integer number (3417010674).

Almost surely, 2^13638457727 is an apocalyptic number.

13638457727 is a deficient number, since it is larger than the sum of its proper divisors (29584969).

13638457727 is an equidigital number, since it uses as much as digits as its factorization.

13638457727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29584968.

The product of its digits is 5927040, while the sum is 53.

The spelling of 13638457727 in words is "thirteen billion, six hundred thirty-eight million, four hundred fifty-seven thousand, seven hundred twenty-seven".