18045469966536 has 48 divisors (see below), whose sum is σ = 48873859068060. Its totient is φ = 6015069118080.

The previous prime is 18045469966471. The next prime is 18045469966541. The reversal of 18045469966536 is 63566996454081.

18045469966536 is a `hidden beast` number, since 1 + 8 + 0 + 45 + 46 + 9 + 9 + 6 + 6 + 536 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 14881802997636 + 3163666968900 = 3857694^2 + 1778670^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3255726 + ... + 6833058.

Almost surely, 2^{18045469966536} is an apocalyptic number.

It is an amenable number.

18045469966536 is an abundant number, since it is smaller than the sum of its proper divisors (30828389101524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18045469966536 is a wasteful number, since it uses less digits than its factorization.

18045469966536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3647406 (or 3647399 counting only the distinct ones).

The product of its (nonzero) digits is 1007769600, while the sum is 72.

The spelling of 18045469966536 in words is "eighteen trillion, forty-five billion, four hundred sixty-nine million, nine hundred sixty-six thousand, five hundred thirty-six".