222222777779 has 4 divisors (see below), whose sum is σ = 222242294376. Its totient is φ = 222203261184.

The previous prime is 222222777767. The next prime is 222222777913. The reversal of 222222777779 is 977777222222.

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

It is a cyclic number.

It is not a de Polignac number, because 222222777779 - 2²⁴ = 222206000563 is a prime.

It is a pancake number, because a pancake can be divided into 222222777779 parts by 666667 straight cuts.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (222422777779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9741209 + ... + 9763994.

It is an arithmetic number, because the mean of its divisors is an integer number (55560573594).

Almost surely, 2^222222777779 is an apocalyptic number.

222222777779 is a deficient number, since it is larger than the sum of its proper divisors (19516597).

222222777779 is a wasteful number, since it uses less digits than its factorization.

222222777779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19516596.

The product of its digits is 9680832, while the sum is 56.

It can be divided in two parts, 222222 and 777779, that added together give a palindrome (1000001).

The spelling of 222222777779 in words is "two hundred twenty-two billion, two hundred twenty-two million, seven hundred seventy-seven thousand, seven hundred seventy-nine".