16545253559 has 4 divisors (see below), whose sum is σ = 16545511080. Its totient is φ = 16544996040.

The previous prime is 16545253547. The next prime is 16545253583. The reversal of 16545253559 is 95535254561.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 95535254561 = 13421 ⋅7118341.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16545253559 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 (16545253759) 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, 55649 + ... + 190229.

It is an arithmetic number, because the mean of its divisors is an integer number (4136377770).

Almost surely, 2^16545253559 is an apocalyptic number.

16545253559 is a deficient number, since it is larger than the sum of its proper divisors (257521).

16545253559 is a wasteful number, since it uses less digits than its factorization.

16545253559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257520.

The product of its digits is 4050000, while the sum is 50.

The spelling of 16545253559 in words is "sixteen billion, five hundred forty-five million, two hundred fifty-three thousand, five hundred fifty-nine".