16447126545391 has 2 divisors, whose sum is σ = 16447126545392. Its totient is φ = 16447126545390.

The previous prime is 16447126545373. The next prime is 16447126545397. The reversal of 16447126545391 is 19354562174461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16447126545391 - 2⁷ = 16447126545263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16447126545397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8223563272695 + 8223563272696.

It is an arithmetic number, because the mean of its divisors is an integer number (8223563272696).

Almost surely, 2^{16447126545391} is an apocalyptic number.

16447126545391 is a deficient number, since it is larger than the sum of its proper divisors (1).

16447126545391 is an equidigital number, since it uses as much as digits as its factorization.

16447126545391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21772800, while the sum is 58.

The spelling of 16447126545391 in words is "sixteen trillion, four hundred forty-seven billion, one hundred twenty-six million, five hundred forty-five thousand, three hundred ninety-one".