16271224073561 has 2 divisors, whose sum is σ = 16271224073562. Its totient is φ = 16271224073560.

The previous prime is 16271224073509. The next prime is 16271224073633. The reversal of 16271224073561 is 16537042217261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15679026105625 + 592197967936 = 3959675^2 + 769544^2 .

It is a cyclic number.

It is not a de Polignac number, because 16271224073561 - 2¹⁴ = 16271224057177 is a prime.

It is not a weakly prime, because it can be changed into another prime (16271224073261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8135612036780 + 8135612036781.

It is an arithmetic number, because the mean of its divisors is an integer number (8135612036781).

Almost surely, 2^{16271224073561} is an apocalyptic number.

It is an amenable number.

16271224073561 is a deficient number, since it is larger than the sum of its proper divisors (1).

16271224073561 is an equidigital number, since it uses as much as digits as its factorization.

16271224073561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 16271224073561 in words is "sixteen trillion, two hundred seventy-one billion, two hundred twenty-four million, seventy-three thousand, five hundred sixty-one".