1800168216 has 128 divisors (see below), whose sum is σ = 5941071360. Its totient is φ = 440064000.

The previous prime is 1800168187. The next prime is 1800168217. The reversal of 1800168216 is 6128610081.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1800168217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2766 + ... + 60066.

It is an arithmetic number, because the mean of its divisors is an integer number (46414620).

Almost surely, 2^1800168216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1800168216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2970535680).

1800168216 is an abundant number, since it is smaller than the sum of its proper divisors (4140903144).

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

1800168216 is a wasteful number, since it uses less digits than its factorization.

1800168216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57345 (or 57341 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 1800168216 is about 42428.3892694502. The cubic root of 1800168216 is about 1216.4782914044.

Adding to 1800168216 its reverse (6128610081), we get a palindrome (7928778297).

The spelling of 1800168216 in words is "one billion, eight hundred million, one hundred sixty-eight thousand, two hundred sixteen".