16573882203661 has 2 divisors, whose sum is σ = 16573882203662. Its totient is φ = 16573882203660.

The previous prime is 16573882203647. The next prime is 16573882203677. The reversal of 16573882203661 is 16630228837561.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8867739515625 + 7706142688036 = 2977875^2 + 2775994^2 .

It is a cyclic number.

It is not a de Polignac number, because 16573882203661 - 2⁵ = 16573882203629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16573882203596 and 16573882203605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16573882203631) 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, 8286941101830 + 8286941101831.

It is an arithmetic number, because the mean of its divisors is an integer number (8286941101831).

Almost surely, 2^{16573882203661} is an apocalyptic number.

It is an amenable number.

16573882203661 is a deficient number, since it is larger than the sum of its proper divisors (1).

16573882203661 is an equidigital number, since it uses as much as digits as its factorization.

16573882203661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17418240, while the sum is 58.

The spelling of 16573882203661 in words is "sixteen trillion, five hundred seventy-three billion, eight hundred eighty-two million, two hundred three thousand, six hundred sixty-one".