16555506555 has 16 divisors (see below), whose sum is σ = 30272926464. Its totient is φ = 7568231520.

The previous prime is 16555506463. The next prime is 16555506557. The reversal of 16555506555 is 55560555561.

It is not a de Polignac number, because 16555506555 - 2⁷ = 16555506427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16555506557) 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, 78835641 + ... + 78835850.

It is an arithmetic number, because the mean of its divisors is an integer number (1892057904).

Almost surely, 2^16555506555 is an apocalyptic number.

16555506555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16555506555 is a deficient number, since it is larger than the sum of its proper divisors (13717419909).

16555506555 is a wasteful number, since it uses less digits than its factorization.

16555506555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157671506.

The product of its (nonzero) digits is 2812500, while the sum is 48.

The spelling of 16555506555 in words is "sixteen billion, five hundred fifty-five million, five hundred six thousand, five hundred fifty-five".