16451376527449 has 2 divisors, whose sum is σ = 16451376527450. Its totient is φ = 16451376527448.

The previous prime is 16451376527317. The next prime is 16451376527461. The reversal of 16451376527449 is 94472567315461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8648851637449 + 7802524890000 = 2940893^2 + 2793300^2 .

It is an emirp because it is prime and its reverse (94472567315461) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16451376527449 is a prime.

It is not a weakly prime, because it can be changed into another prime (16451376527749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8225688263724 + 8225688263725.

It is an arithmetic number, because the mean of its divisors is an integer number (8225688263725).

Almost surely, 2^{16451376527449} is an apocalyptic number.

It is an amenable number.

16451376527449 is a deficient number, since it is larger than the sum of its proper divisors (1).

16451376527449 is an equidigital number, since it uses as much as digits as its factorization.

16451376527449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 152409600, while the sum is 64.

The spelling of 16451376527449 in words is "sixteen trillion, four hundred fifty-one billion, three hundred seventy-six million, five hundred twenty-seven thousand, four hundred forty-nine".