2216645780 has 24 divisors (see below), whose sum is σ = 4656398208. Its totient is φ = 886383648.

The previous prime is 2216645779. The next prime is 2216645797. The reversal of 2216645780 is 875466122.

It is a congruent number.

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, 56777 + ... + 87503.

It is an arithmetic number, because the mean of its divisors is an integer number (194016592).

Almost surely, 2^2216645780 is an apocalyptic number.

2216645780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2216645780 is an abundant number, since it is smaller than the sum of its proper divisors (2439752428).

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

2216645780 is a wasteful number, since it uses less digits than its factorization.

2216645780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34343 (or 34341 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 2216645780 is about 47081.2678249004. The cubic root of 2216645780 is about 1303.8634144080.

The spelling of 2216645780 in words is "two billion, two hundred sixteen million, six hundred forty-five thousand, seven hundred eighty".