13897118109 has 16 divisors (see below), whose sum is σ = 21276930560. Its totient is φ = 7903571760.

The previous prime is 13897118107. The next prime is 13897118117. The reversal of 13897118109 is 90181179831.

It is not a de Polignac number, because 13897118109 - 2¹ = 13897118107 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 (13897118107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1563739 + ... + 1572600.

It is an arithmetic number, because the mean of its divisors is an integer number (1329808160).

Almost surely, 2^13897118109 is an apocalyptic number.

It is an amenable number.

13897118109 is a deficient number, since it is larger than the sum of its proper divisors (7379812451).

13897118109 is a wasteful number, since it uses less digits than its factorization.

13897118109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3136560.

The product of its (nonzero) digits is 108864, while the sum is 48.

It can be divided in two parts, 138971 and 18109, that added together give a triangular number (157080 = T₅₆₀).

The spelling of 13897118109 in words is "thirteen billion, eight hundred ninety-seven million, one hundred eighteen thousand, one hundred nine".