222222777780 has 96 divisors (see below), whose sum is σ = 627109056000. Its totient is φ = 58794703488.

The previous prime is 222222777767. The next prime is 222222777913. The reversal of 222222777780 is 87777222222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14161819 + ... + 14177501.

It is an arithmetic number, because the mean of its divisors is an integer number (6532386000).

Almost surely, 2^222222777780 is an apocalyptic number.

222222777780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222222777780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313554528000).

222222777780 is an abundant number, since it is smaller than the sum of its proper divisors (404886278220).

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

222222777780 is a wasteful number, since it uses less digits than its factorization.

222222777780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17533 (or 17531 counting only the distinct ones).

The product of its (nonzero) digits is 1229312, while the sum is 48.

The spelling of 222222777780 in words is "two hundred twenty-two billion, two hundred twenty-two million, seven hundred seventy-seven thousand, seven hundred eighty".