18108616064 has 384 divisors, whose sum is σ = 48837600000. Its totient is φ = 6526586880.

The previous prime is 18108616063. The next prime is 18108616157. The reversal of 18108616064 is 46061680181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18108616063) 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, 121534262 + ... + 121534410.

It is an arithmetic number, because the mean of its divisors is an integer number (127181250).

Almost surely, 2^18108616064 is an apocalyptic number.

18108616064 is a gapful number since it is divisible by the number (14) 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 18108616064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24418800000).

18108616064 is an abundant number, since it is smaller than the sum of its proper divisors (30728983936).

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

18108616064 is a wasteful number, since it uses less digits than its factorization.

18108616064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The spelling of 18108616064 in words is "eighteen billion, one hundred eight million, six hundred sixteen thousand, sixty-four".