20161327444717 has 2 divisors, whose sum is σ = 20161327444718. Its totient is φ = 20161327444716.

The previous prime is 20161327444633. The next prime is 20161327444757. The reversal of 20161327444717 is 71744472316102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11485822577476 + 8675504867241 = 3389074^2 + 2945421^2 .

It is a cyclic number.

It is not a de Polignac number, because 20161327444717 - 2²⁷ = 20161193226989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20161327444757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10080663722358 + 10080663722359.

It is an arithmetic number, because the mean of its divisors is an integer number (10080663722359).

Almost surely, 2^{20161327444717} is an apocalyptic number.

It is an amenable number.

20161327444717 is a deficient number, since it is larger than the sum of its proper divisors (1).

20161327444717 is an equidigital number, since it uses as much as digits as its factorization.

20161327444717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1580544, while the sum is 49.

The spelling of 20161327444717 in words is "twenty trillion, one hundred sixty-one billion, three hundred twenty-seven million, four hundred forty-four thousand, seven hundred seventeen".