16442621503873 has 2 divisors, whose sum is σ = 16442621503874. Its totient is φ = 16442621503872.

The previous prime is 16442621503853. The next prime is 16442621503927. The reversal of 16442621503873 is 37830512624461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13735451462769 + 2707170041104 = 3706137^2 + 1645348^2 .

It is a cyclic number.

It is not a de Polignac number, because 16442621503873 - 2¹³ = 16442621495681 is a prime.

It is a super-3 number, since 3×16442621503873³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16442621503873.

It is not a weakly prime, because it can be changed into another prime (16442621503853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8221310751936 + 8221310751937.

It is an arithmetic number, because the mean of its divisors is an integer number (8221310751937).

Almost surely, 2^{16442621503873} is an apocalyptic number.

It is an amenable number.

16442621503873 is a deficient number, since it is larger than the sum of its proper divisors (1).

16442621503873 is an equidigital number, since it uses as much as digits as its factorization.

16442621503873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5806080, while the sum is 52.

The spelling of 16442621503873 in words is "sixteen trillion, four hundred forty-two billion, six hundred twenty-one million, five hundred three thousand, eight hundred seventy-three".