16622234561 has 4 divisors (see below), whose sum is σ = 16628055492. Its totient is φ = 16616413632.

The previous prime is 16622234521. The next prime is 16622234567. The reversal of 16622234561 is 16543222661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3704548225 + 12917686336 = 60865^2 + 113656^2 .

It is a cyclic number.

It is not a de Polignac number, because 16622234561 - 2¹⁸ = 16621972417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16622234567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2906180 + ... + 2911893.

It is an arithmetic number, because the mean of its divisors is an integer number (4157013873).

Almost surely, 2^16622234561 is an apocalyptic number.

It is an amenable number.

16622234561 is a deficient number, since it is larger than the sum of its proper divisors (5820931).

16622234561 is an equidigital number, since it uses as much as digits as its factorization.

16622234561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5820930.

The product of its digits is 103680, while the sum is 38.

The spelling of 16622234561 in words is "sixteen billion, six hundred twenty-two million, two hundred thirty-four thousand, five hundred sixty-one".