16505560605 has 8 divisors (see below), whose sum is σ = 26408896992. Its totient is φ = 8802965648.

The previous prime is 16505560601. The next prime is 16505560619. The reversal of 16505560605 is 50606550561.

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 16505560605 - 2² = 16505560601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16505560601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 550185339 + ... + 550185368.

It is an arithmetic number, because the mean of its divisors is an integer number (3301112124).

Almost surely, 2^16505560605 is an apocalyptic number.

16505560605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16505560605 is a deficient number, since it is larger than the sum of its proper divisors (9903336387).

16505560605 is a wasteful number, since it uses less digits than its factorization.

16505560605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100370715.

The product of its (nonzero) digits is 135000, while the sum is 39.

The spelling of 16505560605 in words is "sixteen billion, five hundred five million, five hundred sixty thousand, six hundred five".