1618768222 has 4 divisors (see below), whose sum is σ = 2428152336. Its totient is φ = 809384110.

The previous prime is 1618768201. The next prime is 1618768231. The reversal of 1618768222 is 2228678161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2228678161 = 23369 ⋅95369.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404692054 + ... + 404692057.

It is an arithmetic number, because the mean of its divisors is an integer number (607038084).

Almost surely, 2^1618768222 is an apocalyptic number.

1618768222 is a deficient number, since it is larger than the sum of its proper divisors (809384114).

1618768222 is an equidigital number, since it uses as much as digits as its factorization.

1618768222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809384113.

The product of its digits is 129024, while the sum is 43.

The square root of 1618768222 is about 40233.9187999379. The cubic root of 1618768222 is about 1174.1625472544.

The spelling of 1618768222 in words is "one billion, six hundred eighteen million, seven hundred sixty-eight thousand, two hundred twenty-two".