2218368519779 has 4 divisors (see below), whose sum is σ = 2218399130376. Its totient is φ = 2218337909184.

The previous prime is 2218368519767. The next prime is 2218368519839. The reversal of 2218368519779 is 9779158638122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2218368519779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2218368510779) 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, 15196334 + ... + 15341619.

It is an arithmetic number, because the mean of its divisors is an integer number (554599782594).

Almost surely, 2^{2218368519779} is an apocalyptic number.

2218368519779 is a deficient number, since it is larger than the sum of its proper divisors (30610597).

2218368519779 is an equidigital number, since it uses as much as digits as its factorization.

2218368519779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30610596.

The product of its digits is 91445760, while the sum is 68.

The spelling of 2218368519779 in words is "two trillion, two hundred eighteen billion, three hundred sixty-eight million, five hundred nineteen thousand, seven hundred seventy-nine".