818144377 has 4 divisors (see below), whose sum is σ = 820145140. Its totient is φ = 816143616.

The previous prime is 818144357. The next prime is 818144417. The reversal of 818144377 is 773441818.

818144377 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 773441818 = 2 ⋅386720909.

It can be written as a sum of positive squares in 2 ways, for example, as 666878976 + 151265401 = 25824^2 + 12299^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-818144377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (818144357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 999768 + ... + 1000585.

It is an arithmetic number, because the mean of its divisors is an integer number (205036285).

Almost surely, 2^818144377 is an apocalyptic number.

It is an amenable number.

818144377 is a deficient number, since it is larger than the sum of its proper divisors (2000763).

818144377 is a wasteful number, since it uses less digits than its factorization.

818144377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000762.

The product of its digits is 150528, while the sum is 43.

The square root of 818144377 is about 28603.2231925005. The cubic root of 818144377 is about 935.2835945676.

The spelling of 818144377 in words is "eight hundred eighteen million, one hundred forty-four thousand, three hundred seventy-seven".