1817988063168 has 112 divisors (see below), whose sum is σ = 5361095013120. Its totient is φ = 540330799104.

The previous prime is 1817988063139. The next prime is 1817988063169. The reversal of 1817988063168 is 8613608897181.

It is a junction number, because it is equal to n+sod(n) for n = 1817988063099 and 1817988063108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1817988063169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14595396 + ... + 14719427.

It is an arithmetic number, because the mean of its divisors is an integer number (47866919760).

Almost surely, 2^{1817988063168} is an apocalyptic number.

It is an amenable number.

1817988063168 is an abundant number, since it is smaller than the sum of its proper divisors (3543106949952).

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

1817988063168 is a wasteful number, since it uses less digits than its factorization.

1817988063168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29314874 (or 29314864 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 66.

The spelling of 1817988063168 in words is "one trillion, eight hundred seventeen billion, nine hundred eighty-eight million, sixty-three thousand, one hundred sixty-eight".