16441621958611 has 2 divisors, whose sum is σ = 16441621958612. Its totient is φ = 16441621958610.

The previous prime is 16441621958491. The next prime is 16441621958669. The reversal of 16441621958611 is 11685912614461.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16441621958611 - 2³⁷ = 16304183005139 is a prime.

It is a super-3 number, since 3×16441621958611³ (a number of 41 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (16441621958681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8220810979305 + 8220810979306.

It is an arithmetic number, because the mean of its divisors is an integer number (8220810979306).

Almost surely, 2^{16441621958611} is an apocalyptic number.

16441621958611 is a deficient number, since it is larger than the sum of its proper divisors (1).

16441621958611 is an equidigital number, since it uses as much as digits as its factorization.

16441621958611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2488320, while the sum is 55.

The spelling of 16441621958611 in words is "sixteen trillion, four hundred forty-one billion, six hundred twenty-one million, nine hundred fifty-eight thousand, six hundred eleven".