18123577918459 has 32 divisors (see below), whose sum is σ = 19617460607360. Its totient is φ = 16644229152768.

The previous prime is 18123577918423. The next prime is 18123577918463. The reversal of 18123577918459 is 95481977532181.

It is a cyclic number.

It is not a de Polignac number, because 18123577918459 - 2²⁷ = 18123443700731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18123577318459) 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, 3696423802 + ... + 3696428704.

It is an arithmetic number, because the mean of its divisors is an integer number (613045643980).

Almost surely, 2^{18123577918459} is an apocalyptic number.

18123577918459 is a deficient number, since it is larger than the sum of its proper divisors (1493882688901).

18123577918459 is a wasteful number, since it uses less digits than its factorization.

18123577918459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7031.

The product of its digits is 152409600, while the sum is 70.

The spelling of 18123577918459 in words is "eighteen trillion, one hundred twenty-three billion, five hundred seventy-seven million, nine hundred eighteen thousand, four hundred fifty-nine".