2268915778 has 8 divisors (see below), whose sum is σ = 3603572172. Its totient is φ = 1067725056.

The previous prime is 2268915767. The next prime is 2268915791. The reversal of 2268915778 is 8775198622.

It can be written as a sum of positive squares in 2 ways, for example, as 1672237449 + 596678329 = 40893^2 + 24427^2 .

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

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, 33366375 + ... + 33366442.

Almost surely, 2^2268915778 is an apocalyptic number.

2268915778 is a deficient number, since it is larger than the sum of its proper divisors (1334656394).

2268915778 is a wasteful number, since it uses less digits than its factorization.

2268915778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66732836.

The product of its digits is 3386880, while the sum is 55.

The square root of 2268915778 is about 47633.1373940453. The cubic root of 2268915778 is about 1314.0325553521.

The spelling of 2268915778 in words is "two billion, two hundred sixty-eight million, nine hundred fifteen thousand, seven hundred seventy-eight".