2163991296 has 72 divisors (see below), whose sum is σ = 5882010624. Its totient is φ = 705971200.

The previous prime is 2163991273. The next prime is 2163991303. The reversal of 2163991296 is 6921993612.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6121 + ... + 66071.

It is an arithmetic number, because the mean of its divisors is an integer number (81694592).

Almost surely, 2^2163991296 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 2163991296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2941005312).

2163991296 is an abundant number, since it is smaller than the sum of its proper divisors (3718019328).

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

2163991296 is an equidigital number, since it uses as much as digits as its factorization.

2163991296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60017 (or 60003 counting only the distinct ones).

The product of its digits is 314928, while the sum is 48.

The square root of 2163991296 is about 46518.7198448109. The cubic root of 2163991296 is about 1293.4565265677.

The spelling of 2163991296 in words is "two billion, one hundred sixty-three million, nine hundred ninety-one thousand, two hundred ninety-six".