16545655721071 has 2 divisors, whose sum is σ = 16545655721072. Its totient is φ = 16545655721070.

The previous prime is 16545655721047. The next prime is 16545655721107. The reversal of 16545655721071 is 17012755654561.

It is a happy number.

Together with next prime (16545655721107) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16545655721071 - 2¹¹ = 16545655719023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16545655721171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8272827860535 + 8272827860536.

It is an arithmetic number, because the mean of its divisors is an integer number (8272827860536).

Almost surely, 2^{16545655721071} is an apocalyptic number.

16545655721071 is a deficient number, since it is larger than the sum of its proper divisors (1).

16545655721071 is an equidigital number, since it uses as much as digits as its factorization.

16545655721071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8820000, while the sum is 55.

The spelling of 16545655721071 in words is "sixteen trillion, five hundred forty-five billion, six hundred fifty-five million, seven hundred twenty-one thousand, seventy-one".