16591728543 has 16 divisors (see below), whose sum is σ = 23871792000. Its totient is φ = 10189821024.

The previous prime is 16591728539. The next prime is 16591728551. The reversal of 16591728543 is 34582719561.

It is not a de Polignac number, because 16591728543 - 2² = 16591728539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16591728563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 406821 + ... + 445742.

It is an arithmetic number, because the mean of its divisors is an integer number (1491987000).

Almost surely, 2^16591728543 is an apocalyptic number.

16591728543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

16591728543 is a deficient number, since it is larger than the sum of its proper divisors (7280063457).

16591728543 is a wasteful number, since it uses less digits than its factorization.

16591728543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853078.

The product of its digits is 1814400, while the sum is 51.

The spelling of 16591728543 in words is "sixteen billion, five hundred ninety-one million, seven hundred twenty-eight thousand, five hundred forty-three".