618621306321 has 8 divisors (see below), whose sum is σ = 824942537280. Its totient is φ = 412357139792.

The previous prime is 618621306311. The next prime is 618621306367. The reversal of 618621306321 is 123603126816.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 618621306321 - 2⁶ = 618621306257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 618621306321.

It is not an unprimeable number, because it can be changed into a prime (618621306311) 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 7 ways as a sum of consecutive naturals, for example, 14240805 + ... + 14284178.

It is an arithmetic number, because the mean of its divisors is an integer number (103117817160).

Almost surely, 2^618621306321 is an apocalyptic number.

It is an amenable number.

618621306321 is a deficient number, since it is larger than the sum of its proper divisors (206321230959).

618621306321 is a wasteful number, since it uses less digits than its factorization.

618621306321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28532215.

The product of its (nonzero) digits is 62208, while the sum is 39.

The spelling of 618621306321 in words is "six hundred eighteen billion, six hundred twenty-one million, three hundred six thousand, three hundred twenty-one".