18165214968576 has 216 divisors, whose sum is σ = 52890690963600. Its totient is φ = 5531671461888.

The previous prime is 18165214968539. The next prime is 18165214968587. The reversal of 18165214968576 is 67586941256181.

It is a self number, because there is not a number n which added to its sum of digits gives 18165214968576.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11868400 + ... + 13311248.

Almost surely, 2^{18165214968576} is an apocalyptic number.

18165214968576 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 18165214968576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26445345481800).

18165214968576 is an abundant number, since it is smaller than the sum of its proper divisors (34725475995024).

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

18165214968576 is a wasteful number, since it uses less digits than its factorization.

18165214968576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442991 (or 1442964 counting only the distinct ones).

The product of its digits is 174182400, while the sum is 69.

The spelling of 18165214968576 in words is "eighteen trillion, one hundred sixty-five billion, two hundred fourteen million, nine hundred sixty-eight thousand, five hundred seventy-six".