123664116013 has 2 divisors, whose sum is σ = 123664116014. Its totient is φ = 123664116012.

The previous prime is 123664115999. The next prime is 123664116097. The reversal of 123664116013 is 310611466321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69982469764 + 53681646249 = 264542^2 + 231693^2 .

It is a cyclic number.

It is not a de Polignac number, because 123664116013 - 2⁹ = 123664115501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123664116013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123664116913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61832058006 + 61832058007.

It is an arithmetic number, because the mean of its divisors is an integer number (61832058007).

Almost surely, 2^123664116013 is an apocalyptic number.

It is an amenable number.

123664116013 is a deficient number, since it is larger than the sum of its proper divisors (1).

123664116013 is an equidigital number, since it uses as much as digits as its factorization.

123664116013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 123664116013 in words is "one hundred twenty-three billion, six hundred sixty-four million, one hundred sixteen thousand, thirteen".