16591997814 has 32 divisors (see below), whose sum is σ = 37938990336. Its totient is φ = 4738767840.

The previous prime is 16591997813. The next prime is 16591997833. The reversal of 16591997814 is 41879919561.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16591997813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38649 + ... + 186219.

It is an arithmetic number, because the mean of its divisors is an integer number (1185593448).

Almost surely, 2^16591997814 is an apocalyptic number.

16591997814 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

16591997814 is an abundant number, since it is smaller than the sum of its proper divisors (21346992522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16591997814 is a wasteful number, since it uses less digits than its factorization.

16591997814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150260.

The product of its digits is 4898880, while the sum is 60.

The spelling of 16591997814 in words is "sixteen billion, five hundred ninety-one million, nine hundred ninety-seven thousand, eight hundred fourteen".