18115113259 has 4 divisors (see below), whose sum is σ = 18230496304. Its totient is φ = 17999730216.

The previous prime is 18115113253. The next prime is 18115113277. The reversal of 18115113259 is 95231151181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95231151181 = 80051 ⋅1189631.

It is a cyclic number.

It is not a de Polignac number, because 18115113259 - 2⁷ = 18115113131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18115113253) 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, 57691287 + ... + 57691600.

It is an arithmetic number, because the mean of its divisors is an integer number (4557624076).

Almost surely, 2^18115113259 is an apocalyptic number.

18115113259 is a deficient number, since it is larger than the sum of its proper divisors (115383045).

18115113259 is a wasteful number, since it uses less digits than its factorization.

18115113259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115383044.

The product of its digits is 10800, while the sum is 37.

The spelling of 18115113259 in words is "eighteen billion, one hundred fifteen million, one hundred thirteen thousand, two hundred fifty-nine".