16715664281 has 2 divisors, whose sum is σ = 16715664282. Its totient is φ = 16715664280.

The previous prime is 16715664271. The next prime is 16715664283. The reversal of 16715664281 is 18246651761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16140432025 + 575232256 = 127045^2 + 23984^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16715664281 is a prime.

It is a super-2 number, since 2×16715664281² (a number of 21 digits) contains 22 as substring.

Together with 16715664283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16715664283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8357832140 + 8357832141.

It is an arithmetic number, because the mean of its divisors is an integer number (8357832141).

Almost surely, 2^16715664281 is an apocalyptic number.

It is an amenable number.

16715664281 is a deficient number, since it is larger than the sum of its proper divisors (1).

16715664281 is an equidigital number, since it uses as much as digits as its factorization.

16715664281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 47.

The spelling of 16715664281 in words is "sixteen billion, seven hundred fifteen million, six hundred sixty-four thousand, two hundred eighty-one".