16378686715471 has 2 divisors, whose sum is σ = 16378686715472. Its totient is φ = 16378686715470.

The previous prime is 16378686715439. The next prime is 16378686715481. The reversal of 16378686715471 is 17451768687361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16378686715471 - 2⁵ = 16378686715439 is a prime.

It is a super-3 number, since 3×16378686715471³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 16378686715471.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16378686715481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8189343357735 + 8189343357736.

It is an arithmetic number, because the mean of its divisors is an integer number (8189343357736).

Almost surely, 2^{16378686715471} is an apocalyptic number.

16378686715471 is a deficient number, since it is larger than the sum of its proper divisors (1).

16378686715471 is an equidigital number, since it uses as much as digits as its factorization.

16378686715471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 284497920, while the sum is 70.

The spelling of 16378686715471 in words is "sixteen trillion, three hundred seventy-eight billion, six hundred eighty-six million, seven hundred fifteen thousand, four hundred seventy-one".