618663268 has 12 divisors (see below), whose sum is σ = 1109067372. Its totient is φ = 301786880.

The previous prime is 618663259. The next prime is 618663323. The reversal of 618663268 is 862366816.

It can be written as a sum of positive squares in 2 ways, for example, as 107993664 + 510669604 = 10392^2 + 22598^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1886005 + ... + 1886332.

It is an arithmetic number, because the mean of its divisors is an integer number (92422281).

Almost surely, 2^618663268 is an apocalyptic number.

It is an amenable number.

618663268 is a deficient number, since it is larger than the sum of its proper divisors (490404104).

618663268 is a wasteful number, since it uses less digits than its factorization.

618663268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3772382 (or 3772380 counting only the distinct ones).

The product of its digits is 497664, while the sum is 46.

The square root of 618663268 is about 24872.9424877717. The cubic root of 618663268 is about 852.0886434547.

The spelling of 618663268 in words is "six hundred eighteen million, six hundred sixty-three thousand, two hundred sixty-eight".