16565364516361 has 2 divisors, whose sum is σ = 16565364516362. Its totient is φ = 16565364516360.

The previous prime is 16565364516301. The next prime is 16565364516383. The reversal of 16565364516361 is 16361546356561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12279557808400 + 4285806707961 = 3504220^2 + 2070219^2 .

It is a cyclic number.

It is not a de Polignac number, because 16565364516361 - 2²¹ = 16565362419209 is a prime.

It is a super-2 number, since 2×16565364516361² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16565364516296 and 16565364516305.

It is not a weakly prime, because it can be changed into another prime (16565364516301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8282682258180 + 8282682258181.

It is an arithmetic number, because the mean of its divisors is an integer number (8282682258181).

Almost surely, 2^{16565364516361} is an apocalyptic number.

It is an amenable number.

16565364516361 is a deficient number, since it is larger than the sum of its proper divisors (1).

16565364516361 is an equidigital number, since it uses as much as digits as its factorization.

16565364516361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992000, while the sum is 58.

The spelling of 16565364516361 in words is "sixteen trillion, five hundred sixty-five billion, three hundred sixty-four million, five hundred sixteen thousand, three hundred sixty-one".