2278168816 has 120 divisors (see below), whose sum is σ = 5595606144. Its totient is φ = 872916480.

The previous prime is 2278168787. The next prime is 2278168831. The reversal of 2278168816 is 6188618722.

It is a self number, because there is not a number n which added to its sum of digits gives 2278168816.

It is a congruent number.

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, 6565155 + ... + 6565501.

Almost surely, 2^2278168816 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 2278168816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2797803072).

2278168816 is an abundant number, since it is smaller than the sum of its proper divisors (3317437328).

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

2278168816 is a wasteful number, since it uses less digits than its factorization.

2278168816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519 (or 440 counting only the distinct ones).

The product of its digits is 516096, while the sum is 49.

The square root of 2278168816 is about 47730.1667292290. The cubic root of 2278168816 is about 1315.8164179449.

It can be divided in two parts, 227816 and 8816, that added together give a palindrome (236632).

The spelling of 2278168816 in words is "two billion, two hundred seventy-eight million, one hundred sixty-eight thousand, eight hundred sixteen".