2909218816 has 48 divisors (see below), whose sum is σ = 6648052320. Its totient is φ = 1246801920.

The previous prime is 2909218811. The next prime is 2909218843. The reversal of 2909218816 is 6188129092.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2909218811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87130 + ... + 115801.

It is an arithmetic number, because the mean of its divisors is an integer number (138501090).

Almost surely, 2^2909218816 is an apocalyptic number.

It is an amenable number.

2909218816 is an abundant number, since it is smaller than the sum of its proper divisors (3738833504).

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

2909218816 is an equidigital number, since it uses as much as digits as its factorization.

2909218816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202960 (or 202940 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 2909218816 is about 53937.1747128082. The cubic root of 2909218816 is about 1427.5526326053.

The spelling of 2909218816 in words is "two billion, nine hundred nine million, two hundred eighteen thousand, eight hundred sixteen".