618818121 has 12 divisors (see below), whose sum is σ = 912867072. Its totient is φ = 403767576.

The previous prime is 618818113. The next prime is 618818143. The reversal of 618818121 is 121818816.

It is a happy number.

618818121 is a `hidden beast` number, since 618 + 8 + 18 + 1 + 21 = 666.

It is not a de Polignac number, because 618818121 - 2³ = 618818113 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (618818111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 731041 + ... + 731886.

It is an arithmetic number, because the mean of its divisors is an integer number (76072256).

Almost surely, 2^618818121 is an apocalyptic number.

It is an amenable number.

618818121 is a deficient number, since it is larger than the sum of its proper divisors (294048951).

618818121 is a wasteful number, since it uses less digits than its factorization.

618818121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1462980 (or 1462977 counting only the distinct ones).

The product of its digits is 6144, while the sum is 36.

The square root of 618818121 is about 24876.0551736002. The cubic root of 618818121 is about 852.1597308470.

The spelling of 618818121 in words is "six hundred eighteen million, eight hundred eighteen thousand, one hundred twenty-one".