16055566493 has 2 divisors, whose sum is σ = 16055566494. Its totient is φ = 16055566492.

The previous prime is 16055566489. The next prime is 16055566511. The reversal of 16055566493 is 39466555061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15806021284 + 249545209 = 125722^2 + 15797^2 .

It is a cyclic number.

It is not a de Polignac number, because 16055566493 - 2² = 16055566489 is a prime.

It is a super-2 number, since 2×16055566493² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16055566463) 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, 8027783246 + 8027783247.

It is an arithmetic number, because the mean of its divisors is an integer number (8027783247).

Almost surely, 2^16055566493 is an apocalyptic number.

It is an amenable number.

16055566493 is a deficient number, since it is larger than the sum of its proper divisors (1).

16055566493 is an equidigital number, since it uses as much as digits as its factorization.

16055566493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916000, while the sum is 50.

The spelling of 16055566493 in words is "sixteen billion, fifty-five million, five hundred sixty-six thousand, four hundred ninety-three".