16638071327 has 2 divisors, whose sum is σ = 16638071328. Its totient is φ = 16638071326.

The previous prime is 16638071293. The next prime is 16638071347. The reversal of 16638071327 is 72317083661.

It is a strong prime.

It is an emirp because it is prime and its reverse (72317083661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16638071327 - 2¹⁸ = 16637809183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16638071347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8319035663 + 8319035664.

It is an arithmetic number, because the mean of its divisors is an integer number (8319035664).

Almost surely, 2^16638071327 is an apocalyptic number.

16638071327 is a deficient number, since it is larger than the sum of its proper divisors (1).

16638071327 is an equidigital number, since it uses as much as digits as its factorization.

16638071327 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 44.

The spelling of 16638071327 in words is "sixteen billion, six hundred thirty-eight million, seventy-one thousand, three hundred twenty-seven".