222779030688 has 144 divisors (see below), whose sum is σ = 670997756520. Its totient is φ = 69870256128.

The previous prime is 222779030687. The next prime is 222779030729. The reversal of 222779030688 is 886030977222.

It can be written as a sum of positive squares in 4 ways, for example, as 220700764944 + 2078265744 = 469788^2 + 45588^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (222779030687) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26615368 + ... + 26623736.

Almost surely, 2^222779030688 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 222779030688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335498878260).

222779030688 is an abundant number, since it is smaller than the sum of its proper divisors (448218725832).

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

222779030688 is a wasteful number, since it uses less digits than its factorization.

222779030688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13839 (or 13828 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 222779030688 in words is "two hundred twenty-two billion, seven hundred seventy-nine million, thirty thousand, six hundred eighty-eight".