618308812999 has 4 divisors (see below), whose sum is σ = 654679919664. Its totient is φ = 581937706336.

The previous prime is 618308812997. The next prime is 618308813009. The reversal of 618308812999 is 999218803816.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 618308812999 - 2¹ = 618308812997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 618308812999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618308812997) 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, 18185553307 + ... + 18185553340.

It is an arithmetic number, because the mean of its divisors is an integer number (163669979916).

Almost surely, 2^618308812999 is an apocalyptic number.

618308812999 is a deficient number, since it is larger than the sum of its proper divisors (36371106665).

618308812999 is a wasteful number, since it uses less digits than its factorization.

618308812999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36371106664.

The product of its (nonzero) digits is 13436928, while the sum is 64.

The spelling of 618308812999 in words is "six hundred eighteen billion, three hundred eight million, eight hundred twelve thousand, nine hundred ninety-nine".