222779215728 has 280 divisors, whose sum is σ = 666231941760. Its totient is φ = 72089118720.

The previous prime is 222779215717. The next prime is 222779215759. The reversal of 222779215728 is 827512977222.

It is a happy number.

222779215728 is a `hidden beast` number, since 22 + 27 + 7 + 9 + 21 + 572 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 106642908 + ... + 106644996.

It is an arithmetic number, because the mean of its divisors is an integer number (2379399792).

Almost surely, 2^222779215728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222779215728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (333115970880).

222779215728 is an abundant number, since it is smaller than the sum of its proper divisors (443452726032).

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

222779215728 is a wasteful number, since it uses less digits than its factorization.

222779215728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2379 (or 2358 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 54.

The spelling of 222779215728 in words is "two hundred twenty-two billion, seven hundred seventy-nine million, two hundred fifteen thousand, seven hundred twenty-eight".