17810997745559 has 2 divisors, whose sum is σ = 17810997745560. Its totient is φ = 17810997745558.

The previous prime is 17810997745493. The next prime is 17810997745579. The reversal of 17810997745559 is 95554779901871.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17810997745559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 17810997745559.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17810997745579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8905498872779 + 8905498872780.

It is an arithmetic number, because the mean of its divisors is an integer number (8905498872780).

Almost surely, 2^{17810997745559} is an apocalyptic number.

17810997745559 is a deficient number, since it is larger than the sum of its proper divisors (1).

17810997745559 is an equidigital number, since it uses as much as digits as its factorization.

17810997745559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1000188000, while the sum is 77.

The spelling of 17810997745559 in words is "seventeen trillion, eight hundred ten billion, nine hundred ninety-seven million, seven hundred forty-five thousand, five hundred fifty-nine".