123320616663 has 4 divisors (see below), whose sum is σ = 164427488888. Its totient is φ = 82213744440.

The previous prime is 123320616619. The next prime is 123320616677. The reversal of 123320616663 is 366616023321.

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

It is not a de Polignac number, because 123320616663 - 2⁸ = 123320616407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123327616663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20553436108 + ... + 20553436113.

It is an arithmetic number, because the mean of its divisors is an integer number (41106872222).

Almost surely, 2^123320616663 is an apocalyptic number.

123320616663 is a deficient number, since it is larger than the sum of its proper divisors (41106872225).

123320616663 is an equidigital number, since it uses as much as digits as its factorization.

123320616663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41106872224.

The product of its (nonzero) digits is 139968, while the sum is 39.

Adding to 123320616663 its reverse (366616023321), we get a palindrome (489936639984).

The spelling of 123320616663 in words is "one hundred twenty-three billion, three hundred twenty million, six hundred sixteen thousand, six hundred sixty-three".