16556015751089 has 2 divisors, whose sum is σ = 16556015751090. Its totient is φ = 16556015751088.

The previous prime is 16556015751073. The next prime is 16556015751139. The reversal of 16556015751089 is 98015751065561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16540554072064 + 15461679025 = 4067008^2 + 124345^2 .

It is a cyclic number.

It is not a de Polignac number, because 16556015751089 - 2⁴ = 16556015751073 is a prime.

It is not a weakly prime, because it can be changed into another prime (16556015751689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8278007875544 + 8278007875545.

It is an arithmetic number, because the mean of its divisors is an integer number (8278007875545).

Almost surely, 2^{16556015751089} is an apocalyptic number.

It is an amenable number.

16556015751089 is a deficient number, since it is larger than the sum of its proper divisors (1).

16556015751089 is an equidigital number, since it uses as much as digits as its factorization.

16556015751089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340000, while the sum is 59.

The spelling of 16556015751089 in words is "sixteen trillion, five hundred fifty-six billion, fifteen million, seven hundred fifty-one thousand, eighty-nine".