16503656645 has 8 divisors (see below), whose sum is σ = 22633586304. Its totient is φ = 11316793104.

The previous prime is 16503656579. The next prime is 16503656669. The reversal of 16503656645 is 54665630561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16503656645 - 2¹⁰ = 16503655621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16503656645.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235766489 + ... + 235766558.

It is an arithmetic number, because the mean of its divisors is an integer number (2829198288).

Almost surely, 2^16503656645 is an apocalyptic number.

It is an amenable number.

16503656645 is a deficient number, since it is larger than the sum of its proper divisors (6129929659).

16503656645 is an equidigital number, since it uses as much as digits as its factorization.

16503656645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471533059.

The product of its (nonzero) digits is 1944000, while the sum is 47.

The spelling of 16503656645 in words is "sixteen billion, five hundred three million, six hundred fifty-six thousand, six hundred forty-five".