16622711881 has 2 divisors, whose sum is σ = 16622711882. Its totient is φ = 16622711880.

The previous prime is 16622711867. The next prime is 16622711891. The reversal of 16622711881 is 18811722661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16585318656 + 37393225 = 128784^2 + 6115^2 .

It is a cyclic number.

It is not a de Polignac number, because 16622711881 - 2²⁷ = 16488494153 is a prime.

It is a super-2 number, since 2×16622711881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16622711821) 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 as a sum of consecutive naturals, namely, 8311355940 + 8311355941.

It is an arithmetic number, because the mean of its divisors is an integer number (8311355941).

Almost surely, 2^16622711881 is an apocalyptic number.

It is an amenable number.

16622711881 is a deficient number, since it is larger than the sum of its proper divisors (1).

16622711881 is an equidigital number, since it uses as much as digits as its factorization.

16622711881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 43.

The spelling of 16622711881 in words is "sixteen billion, six hundred twenty-two million, seven hundred eleven thousand, eight hundred eighty-one".