16516378915271 has 2 divisors, whose sum is σ = 16516378915272. Its totient is φ = 16516378915270.

The previous prime is 16516378915243. The next prime is 16516378915273. The reversal of 16516378915271 is 17251987361561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16516378915271 - 2¹⁸ = 16516378653127 is a prime.

It is a Sophie Germain prime.

Together with 16516378915273, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16516378915273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8258189457635 + 8258189457636.

It is an arithmetic number, because the mean of its divisors is an integer number (8258189457636).

Almost surely, 2^{16516378915271} is an apocalyptic number.

16516378915271 is a deficient number, since it is larger than the sum of its proper divisors (1).

16516378915271 is an equidigital number, since it uses as much as digits as its factorization.

16516378915271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19051200, while the sum is 62.

The spelling of 16516378915271 in words is "sixteen trillion, five hundred sixteen billion, three hundred seventy-eight million, nine hundred fifteen thousand, two hundred seventy-one".