18788785007616 has 264 divisors, whose sum is σ = 60589372012624. Its totient is φ = 5781163622400.

The previous prime is 18788785007599. The next prime is 18788785007617. The reversal of 18788785007616 is 61670058788781.

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

It is not an unprimeable number, because it can be changed into a prime (18788785007617) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 330666 + ... + 6138966.

Almost surely, 2^{18788785007616} is an apocalyptic number.

18788785007616 is a gapful number since it is divisible by the number (16) 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 18788785007616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30294686006312).

18788785007616 is an abundant number, since it is smaller than the sum of its proper divisors (41800587005008).

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

18788785007616 is an equidigital number, since it uses as much as digits as its factorization.

18788785007616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5808349 (or 5808319 counting only the distinct ones).

The product of its (nonzero) digits is 252887040, while the sum is 72.

The spelling of 18788785007616 in words is "eighteen trillion, seven hundred eighty-eight billion, seven hundred eighty-five million, seven thousand, six hundred sixteen".