2218589365816 has 8 divisors (see below), whose sum is σ = 4159855060920. Its totient is φ = 1109294682904.

The previous prime is 2218589365813. The next prime is 2218589365819. The reversal of 2218589365816 is 6185639858122.

It is an interprime number because it is at equal distance from previous prime (2218589365813) and next prime (2218589365819).

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×2218589365816² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218589365813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138661835356 + ... + 138661835371.

It is an arithmetic number, because the mean of its divisors is an integer number (519981882615).

Almost surely, 2^{2218589365816} is an apocalyptic number.

It is an amenable number.

2218589365816 is a deficient number, since it is larger than the sum of its proper divisors (1941265695104).

2218589365816 is a wasteful number, since it uses less digits than its factorization.

2218589365816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277323670733 (or 277323670729 counting only the distinct ones).

The product of its digits is 49766400, while the sum is 64.

The spelling of 2218589365816 in words is "two trillion, two hundred eighteen billion, five hundred eighty-nine million, three hundred sixty-five thousand, eight hundred sixteen".