63965923913 has 2 divisors, whose sum is σ = 63965923914. Its totient is φ = 63965923912.

The previous prime is 63965923891. The next prime is 63965923937. The reversal of 63965923913 is 31932956936.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37952104969 + 26013818944 = 194813^2 + 161288^2 .

It is a cyclic number.

It is not a de Polignac number, because 63965923913 - 2¹⁴ = 63965907529 is a prime.

It is not a weakly prime, because it can be changed into another prime (63965920913) 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, 31982961956 + 31982961957.

It is an arithmetic number, because the mean of its divisors is an integer number (31982961957).

Almost surely, 2^63965923913 is an apocalyptic number.

It is an amenable number.

63965923913 is a deficient number, since it is larger than the sum of its proper divisors (1).

63965923913 is an equidigital number, since it uses as much as digits as its factorization.

63965923913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7085880, while the sum is 56.

The spelling of 63965923913 in words is "sixty-three billion, nine hundred sixty-five million, nine hundred twenty-three thousand, nine hundred thirteen".