16591766401 has 16 divisors (see below), whose sum is σ = 19646530560. Its totient is φ = 13711544640.

The previous prime is 16591766393. The next prime is 16591766423. The reversal of 16591766401 is 10466719561.

16591766401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 16591766401 - 2³ = 16591766393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16591766461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83746 + ... + 200491.

It is an arithmetic number, because the mean of its divisors is an integer number (1227908160).

Almost surely, 2^16591766401 is an apocalyptic number.

It is an amenable number.

16591766401 is a deficient number, since it is larger than the sum of its proper divisors (3054764159).

16591766401 is a wasteful number, since it uses less digits than its factorization.

16591766401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284544.

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 16591766401 in words is "sixteen billion, five hundred ninety-one million, seven hundred sixty-six thousand, four hundred one".