16523863117 has 2 divisors, whose sum is σ = 16523863118. Its totient is φ = 16523863116.

The previous prime is 16523863051. The next prime is 16523863199. The reversal of 16523863117 is 71136832561.

16523863117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15035909641 + 1487953476 = 122621^2 + 38574^2 .

It is a cyclic number.

It is not a de Polignac number, because 16523863117 - 2¹¹ = 16523861069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16523867117) 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, 8261931558 + 8261931559.

It is an arithmetic number, because the mean of its divisors is an integer number (8261931559).

Almost surely, 2^16523863117 is an apocalyptic number.

It is an amenable number.

16523863117 is a deficient number, since it is larger than the sum of its proper divisors (1).

16523863117 is an equidigital number, since it uses as much as digits as its factorization.

16523863117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The spelling of 16523863117 in words is "sixteen billion, five hundred twenty-three million, eight hundred sixty-three thousand, one hundred seventeen".