16086542921 has 2 divisors, whose sum is σ = 16086542922. Its totient is φ = 16086542920.

The previous prime is 16086542911. The next prime is 16086543001. The reversal of 16086542921 is 12924568061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15104410000 + 982132921 = 122900^2 + 31339^2 .

It is a cyclic number.

It is not a de Polignac number, because 16086542921 - 2¹⁰ = 16086541897 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16086542911) 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, 8043271460 + 8043271461.

It is an arithmetic number, because the mean of its divisors is an integer number (8043271461).

Almost surely, 2^16086542921 is an apocalyptic number.

It is an amenable number.

16086542921 is a deficient number, since it is larger than the sum of its proper divisors (1).

16086542921 is an equidigital number, since it uses as much as digits as its factorization.

16086542921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 16086542921 in words is "sixteen billion, eighty-six million, five hundred forty-two thousand, nine hundred twenty-one".