16163321777 has 2 divisors, whose sum is σ = 16163321778. Its totient is φ = 16163321776.

The previous prime is 16163321753. The next prime is 16163321819. The reversal of 16163321777 is 77712336161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9114711841 + 7048609936 = 95471^2 + 83956^2 .

It is an emirp because it is prime and its reverse (77712336161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16163321777 - 2¹⁴ = 16163305393 is a prime.

It is a super-2 number, since 2×16163321777² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16163321677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8081660888 + 8081660889.

It is an arithmetic number, because the mean of its divisors is an integer number (8081660889).

Almost surely, 2^16163321777 is an apocalyptic number.

It is an amenable number.

16163321777 is a deficient number, since it is larger than the sum of its proper divisors (1).

16163321777 is an equidigital number, since it uses as much as digits as its factorization.

16163321777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 222264, while the sum is 44.

The spelling of 16163321777 in words is "sixteen billion, one hundred sixty-three million, three hundred twenty-one thousand, seven hundred seventy-seven".