16545253561 has 16 divisors (see below), whose sum is σ = 17689492800. Its totient is φ = 15428717568.

The previous prime is 16545253547. The next prime is 16545253583. The reversal of 16545253561 is 16535254561.

It is a happy number.

16545253561 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 a de Polignac number, because none of the positive numbers 2^k-16545253561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16545253541) 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, 1972785 + ... + 1981153.

It is an arithmetic number, because the mean of its divisors is an integer number (1105593300).

Almost surely, 2^16545253561 is an apocalyptic number.

It is an amenable number.

16545253561 is a deficient number, since it is larger than the sum of its proper divisors (1144239239).

16545253561 is a wasteful number, since it uses less digits than its factorization.

16545253561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10008.

The product of its digits is 540000, while the sum is 43.

The spelling of 16545253561 in words is "sixteen billion, five hundred forty-five million, two hundred fifty-three thousand, five hundred sixty-one".