16540908559 has 4 divisors (see below), whose sum is σ = 18903895504. Its totient is φ = 14177921616.

The previous prime is 16540908539. The next prime is 16540908577. The reversal of 16540908559 is 95580904561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95580904561 = 24439 ⋅3910999.

It is a cyclic number.

It is not a de Polignac number, because 16540908559 - 2¹⁹ = 16540384271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16540908509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1181493462 + ... + 1181493475.

It is an arithmetic number, because the mean of its divisors is an integer number (4725973876).

Almost surely, 2^16540908559 is an apocalyptic number.

16540908559 is a deficient number, since it is larger than the sum of its proper divisors (2362986945).

16540908559 is an equidigital number, since it uses as much as digits as its factorization.

16540908559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362986944.

The product of its (nonzero) digits is 1944000, while the sum is 52.

The spelling of 16540908559 in words is "sixteen billion, five hundred forty million, nine hundred eight thousand, five hundred fifty-nine".