16355888121697 has 2 divisors, whose sum is σ = 16355888121698. Its totient is φ = 16355888121696.

The previous prime is 16355888121659. The next prime is 16355888121757. The reversal of 16355888121697 is 79612188855361.

16355888121697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15661972465441 + 693915656256 = 3957521^2 + 833016^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16355888121697 is a prime.

It is not a weakly prime, because it can be changed into another prime (16355888121647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8177944060848 + 8177944060849.

It is an arithmetic number, because the mean of its divisors is an integer number (8177944060849).

Almost surely, 2^{16355888121697} is an apocalyptic number.

It is an amenable number.

16355888121697 is a deficient number, since it is larger than the sum of its proper divisors (1).

16355888121697 is an equidigital number, since it uses as much as digits as its factorization.

16355888121697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174182400, while the sum is 70.

The spelling of 16355888121697 in words is "sixteen trillion, three hundred fifty-five billion, eight hundred eighty-eight million, one hundred twenty-one thousand, six hundred ninety-seven".