18558360612 has 144 divisors (see below), whose sum is σ = 53509921920. Its totient is φ = 5368281600.

The previous prime is 18558360577. The next prime is 18558360617. The reversal of 18558360612 is 21606385581.

18558360612 is a `hidden beast` number, since 1 + 8 + 5 + 583 + 6 + 0 + 61 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (18558360617) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5180662 + ... + 5184242.

It is an arithmetic number, because the mean of its divisors is an integer number (371596680).

Almost surely, 2^18558360612 is an apocalyptic number.

18558360612 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 18558360612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26754960960).

18558360612 is an abundant number, since it is smaller than the sum of its proper divisors (34951561308).

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

18558360612 is a wasteful number, since it uses less digits than its factorization.

18558360612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4194 (or 4189 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 18558360612 in words is "eighteen billion, five hundred fifty-eight million, three hundred sixty thousand, six hundred twelve".