19690795599569 has 2 divisors, whose sum is σ = 19690795599570. Its totient is φ = 19690795599568.

The previous prime is 19690795599551. The next prime is 19690795599571. The reversal of 19690795599569 is 96599559709691.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15145640227600 + 4545155371969 = 3891740^2 + 2131937^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19690795599569 is a prime.

It is a super-2 number, since 2×19690795599569² (a number of 27 digits) contains 22 as substring.

Together with 19690795599571, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19690795599509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9845397799784 + 9845397799785.

It is an arithmetic number, because the mean of its divisors is an integer number (9845397799785).

Almost surely, 2^{19690795599569} is an apocalyptic number.

It is an amenable number.

19690795599569 is a deficient number, since it is larger than the sum of its proper divisors (1).

19690795599569 is an equidigital number, since it uses as much as digits as its factorization.

19690795599569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16740391500, while the sum is 89.

The spelling of 19690795599569 in words is "nineteen trillion, six hundred ninety billion, seven hundred ninety-five million, five hundred ninety-nine thousand, five hundred sixty-nine".