222459145778 has 8 divisors (see below), whose sum is σ = 333730490268. Its totient is φ = 111215649024.

The previous prime is 222459145747. The next prime is 222459145781. The reversal of 222459145778 is 877541954222.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 204976224049 + 17482921729 = 452743^2 + 132223^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6941951 + ... + 6973922.

Almost surely, 2^222459145778 is an apocalyptic number.

222459145778 is a deficient number, since it is larger than the sum of its proper divisors (111271344490).

222459145778 is a wasteful number, since it uses less digits than its factorization.

222459145778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13923868.

The product of its digits is 11289600, while the sum is 56.

The spelling of 222459145778 in words is "two hundred twenty-two billion, four hundred fifty-nine million, one hundred forty-five thousand, seven hundred seventy-eight".