16126253605321 has 2 divisors, whose sum is σ = 16126253605322. Its totient is φ = 16126253605320.

The previous prime is 16126253605289. The next prime is 16126253605333. The reversal of 16126253605321 is 12350635262161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8335121217721 + 7791132387600 = 2887061^2 + 2791260^2 .

It is a cyclic number.

It is not a de Polignac number, because 16126253605321 - 2⁵ = 16126253605289 is a prime.

It is not a weakly prime, because it can be changed into another prime (16126253705321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8063126802660 + 8063126802661.

It is an arithmetic number, because the mean of its divisors is an integer number (8063126802661).

Almost surely, 2^{16126253605321} is an apocalyptic number.

It is an amenable number.

16126253605321 is a deficient number, since it is larger than the sum of its proper divisors (1).

16126253605321 is an equidigital number, since it uses as much as digits as its factorization.

16126253605321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 43.

Adding to 16126253605321 its reverse (12350635262161), we get a palindrome (28476888867482).

The spelling of 16126253605321 in words is "sixteen trillion, one hundred twenty-six billion, two hundred fifty-three million, six hundred five thousand, three hundred twenty-one".