16551105464791 has 2 divisors, whose sum is σ = 16551105464792. Its totient is φ = 16551105464790.

The previous prime is 16551105464741. The next prime is 16551105464813. The reversal of 16551105464791 is 19746450115561.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16551105464791 - 2⁹ = 16551105464279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16551105464741) 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, 8275552732395 + 8275552732396.

It is an arithmetic number, because the mean of its divisors is an integer number (8275552732396).

Almost surely, 2^{16551105464791} is an apocalyptic number.

16551105464791 is a deficient number, since it is larger than the sum of its proper divisors (1).

16551105464791 is an equidigital number, since it uses as much as digits as its factorization.

16551105464791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536000, while the sum is 55.

The spelling of 16551105464791 in words is "sixteen trillion, five hundred fifty-one billion, one hundred five million, four hundred sixty-four thousand, seven hundred ninety-one".