16523867117 has 2 divisors, whose sum is σ = 16523867118. Its totient is φ = 16523867116.

The previous prime is 16523867021. The next prime is 16523867137. The reversal of 16523867117 is 71176832561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12774876676 + 3748990441 = 113026^2 + 61229^2 .

It is a cyclic number.

It is not a de Polignac number, because 16523867117 - 2¹⁸ = 16523604973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16523867137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8261933558 + 8261933559.

It is an arithmetic number, because the mean of its divisors is an integer number (8261933559).

Almost surely, 2^16523867117 is an apocalyptic number.

It is an amenable number.

16523867117 is a deficient number, since it is larger than the sum of its proper divisors (1).

16523867117 is an equidigital number, since it uses as much as digits as its factorization.

16523867117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 47.

The spelling of 16523867117 in words is "sixteen billion, five hundred twenty-three million, eight hundred sixty-seven thousand, one hundred seventeen".