16555550505 has 16 divisors (see below), whose sum is σ = 28526487360. Its totient is φ = 8150424768.

The previous prime is 16555550491. The next prime is 16555550513. The reversal of 16555550505 is 50505555561.

It is not a de Polignac number, because 16555550505 - 2⁷ = 16555550377 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 42449935 + ... + 42450324.

It is an arithmetic number, because the mean of its divisors is an integer number (1782905460).

Almost surely, 2^16555550505 is an apocalyptic number.

16555550505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16555550505 is a deficient number, since it is larger than the sum of its proper divisors (11970936855).

16555550505 is a wasteful number, since it uses less digits than its factorization.

16555550505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84900280.

The product of its (nonzero) digits is 468750, while the sum is 42.

The spelling of 16555550505 in words is "sixteen billion, five hundred fifty-five million, five hundred fifty thousand, five hundred five".