16277577668389 has 2 divisors, whose sum is σ = 16277577668390. Its totient is φ = 16277577668388.

The previous prime is 16277577668237. The next prime is 16277577668399. The reversal of 16277577668389 is 98386677577261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15479172872164 + 798404796225 = 3934358^2 + 893535^2 .

It is an emirp because it is prime and its reverse (98386677577261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16277577668389 - 2¹⁵ = 16277577635621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16277577668399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8138788834194 + 8138788834195.

It is an arithmetic number, because the mean of its divisors is an integer number (8138788834195).

Almost surely, 2^{16277577668389} is an apocalyptic number.

It is an amenable number.

16277577668389 is a deficient number, since it is larger than the sum of its proper divisors (1).

16277577668389 is an equidigital number, since it uses as much as digits as its factorization.

16277577668389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8961684480, while the sum is 82.

The spelling of 16277577668389 in words is "sixteen trillion, two hundred seventy-seven billion, five hundred seventy-seven million, six hundred sixty-eight thousand, three hundred eighty-nine".