16861338719 has 2 divisors, whose sum is σ = 16861338720. Its totient is φ = 16861338718.

The previous prime is 16861338707. The next prime is 16861338721. The reversal of 16861338719 is 91783316861.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16861338719 is a prime.

It is a super-2 number, since 2×16861338719² (a number of 21 digits) contains 22 as substring.

Together with 16861338721, 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 (16861338799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8430669359 + 8430669360.

It is an arithmetic number, because the mean of its divisors is an integer number (8430669360).

Almost surely, 2^16861338719 is an apocalyptic number.

16861338719 is a deficient number, since it is larger than the sum of its proper divisors (1).

16861338719 is an equidigital number, since it uses as much as digits as its factorization.

16861338719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 53.

The spelling of 16861338719 in words is "sixteen billion, eight hundred sixty-one million, three hundred thirty-eight thousand, seven hundred nineteen".