2216789761 has 4 divisors (see below), whose sum is σ = 2248012224. Its totient is φ = 2185567300.

The previous prime is 2216789747. The next prime is 2216789801. The reversal of 2216789761 is 1679876122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2216789761 - 2⁹ = 2216789249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2216789711) 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, 15611125 + ... + 15611266.

It is an arithmetic number, because the mean of its divisors is an integer number (562003056).

Almost surely, 2^2216789761 is an apocalyptic number.

It is an amenable number.

2216789761 is a deficient number, since it is larger than the sum of its proper divisors (31222463).

2216789761 is an equidigital number, since it uses as much as digits as its factorization.

2216789761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31222462.

The product of its digits is 508032, while the sum is 49.

The square root of 2216789761 is about 47082.7968689202. The cubic root of 2216789761 is about 1303.8916443723.

The spelling of 2216789761 in words is "two billion, two hundred sixteen million, seven hundred eighty-nine thousand, seven hundred sixty-one".