2168069816 has 64 divisors (see below), whose sum is σ = 4588047360. Its totient is φ = 952543200.

The previous prime is 2168069807. The next prime is 2168069833. The reversal of 2168069816 is 6189608612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2621195 + ... + 2622021.

It is an arithmetic number, because the mean of its divisors is an integer number (71688240).

Almost surely, 2^2168069816 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 2168069816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2294023680).

2168069816 is an abundant number, since it is smaller than the sum of its proper divisors (2419977544).

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

2168069816 is an equidigital number, since it uses as much as digits as its factorization.

2168069816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937 (or 871 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 2168069816 is about 46562.5366147507. The cubic root of 2168069816 is about 1294.2686181839.

It can be divided in two parts, 216806 and 9816, that added together give a palindrome (226622).

The spelling of 2168069816 in words is "two billion, one hundred sixty-eight million, sixty-nine thousand, eight hundred sixteen".