18456364512 has 120 divisors (see below), whose sum is σ = 55603869552. Its totient is φ = 6002035200.

The previous prime is 18456364499. The next prime is 18456364519. The reversal of 18456364512 is 21546365481.

18456364512 is a `hidden beast` number, since 1 + 8 + 4 + 5 + 636 + 4 + 5 + 1 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18456364519) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19437 + ... + 193107.

Almost surely, 2^18456364512 is an apocalyptic number.

18456364512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18456364512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27801934776).

18456364512 is an abundant number, since it is smaller than the sum of its proper divisors (37147505040).

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

18456364512 is a wasteful number, since it uses less digits than its factorization.

18456364512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173734 (or 173717 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The spelling of 18456364512 in words is "eighteen billion, four hundred fifty-six million, three hundred sixty-four thousand, five hundred twelve".