2163378834 has 64 divisors (see below), whose sum is σ = 5011169280. Its totient is φ = 691033680.

The previous prime is 2163378799. The next prime is 2163378851. The reversal of 2163378834 is 4388733612.

2163378834 is a `hidden beast` number, since 2 + 1 + 633 + 7 + 8 + 8 + 3 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 2163378834.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166149 + ... + 178695.

It is an arithmetic number, because the mean of its divisors is an integer number (78299520).

Almost surely, 2^2163378834 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2163378834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2505584640).

2163378834 is an abundant number, since it is smaller than the sum of its proper divisors (2847790446).

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

2163378834 is a wasteful number, since it uses less digits than its factorization.

2163378834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12692 (or 12686 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 2163378834 is about 46512.1364162086. The cubic root of 2163378834 is about 1293.3344885354.

The spelling of 2163378834 in words is "two billion, one hundred sixty-three million, three hundred seventy-eight thousand, eight hundred thirty-four".