16321622576989 has 2 divisors, whose sum is σ = 16321622576990. Its totient is φ = 16321622576988.

The previous prime is 16321622576939. The next prime is 16321622577079. The reversal of 16321622576989 is 98967522612361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15258007822500 + 1063614754489 = 3906150^2 + 1031317^2 .

It is a cyclic number.

It is not a de Polignac number, because 16321622576989 - 2²¹ = 16321620479837 is a prime.

It is a super-2 number, since 2×16321622576989² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16321622576939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8160811288494 + 8160811288495.

It is an arithmetic number, because the mean of its divisors is an integer number (8160811288495).

Almost surely, 2^{16321622576989} is an apocalyptic number.

It is an amenable number.

16321622576989 is a deficient number, since it is larger than the sum of its proper divisors (1).

16321622576989 is an equidigital number, since it uses as much as digits as its factorization.

16321622576989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 117573120, while the sum is 67.

The spelling of 16321622576989 in words is "sixteen trillion, three hundred twenty-one billion, six hundred twenty-two million, five hundred seventy-six thousand, nine hundred eighty-nine".