18135759565 has 32 divisors (see below), whose sum is σ = 27140914944. Its totient is φ = 11302103040.

The previous prime is 18135759563. The next prime is 18135759571. The reversal of 18135759565 is 56595753181.

It is not a de Polignac number, because 18135759565 - 2¹ = 18135759563 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18135759563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2428317 + ... + 2435773.

It is an arithmetic number, because the mean of its divisors is an integer number (848153592).

Almost surely, 2^18135759565 is an apocalyptic number.

It is an amenable number.

18135759565 is a deficient number, since it is larger than the sum of its proper divisors (9005155379).

18135759565 is a wasteful number, since it uses less digits than its factorization.

18135759565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13797.

The product of its digits is 5670000, while the sum is 55.

The spelling of 18135759565 in words is "eighteen billion, one hundred thirty-five million, seven hundred fifty-nine thousand, five hundred sixty-five".