16506545555 has 16 divisors (see below), whose sum is σ = 19896011424. Its totient is φ = 13146551040.

The previous prime is 16506545551. The next prime is 16506545557. The reversal of 16506545555 is 55554560561.

It is a happy number.

It is not a de Polignac number, because 16506545555 - 2² = 16506545551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16506545551) 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 15 ways as a sum of consecutive naturals, for example, 1798037 + ... + 1807193.

It is an arithmetic number, because the mean of its divisors is an integer number (1243500714).

Almost surely, 2^16506545555 is an apocalyptic number.

16506545555 is a deficient number, since it is larger than the sum of its proper divisors (3389465869).

16506545555 is a wasteful number, since it uses less digits than its factorization.

16506545555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10726.

The product of its (nonzero) digits is 2250000, while the sum is 47.

The spelling of 16506545555 in words is "sixteen billion, five hundred six million, five hundred forty-five thousand, five hundred fifty-five".