13638733511 has 4 divisors (see below), whose sum is σ = 14687866872. Its totient is φ = 12589600152.

The previous prime is 13638733489. The next prime is 13638733519. The reversal of 13638733511 is 11533783631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11533783631 = 311 ⋅37086121.

It is a cyclic number.

It is not a de Polignac number, because 13638733511 - 2⁶ = 13638733447 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 (13638733519) 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, 524566661 + ... + 524566686.

It is an arithmetic number, because the mean of its divisors is an integer number (3671966718).

Almost surely, 2^13638733511 is an apocalyptic number.

13638733511 is a deficient number, since it is larger than the sum of its proper divisors (1049133361).

13638733511 is a wasteful number, since it uses less digits than its factorization.

13638733511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049133360.

The product of its digits is 136080, while the sum is 41.

The spelling of 13638733511 in words is "thirteen billion, six hundred thirty-eight million, seven hundred thirty-three thousand, five hundred eleven".