16655655555 has 48 divisors (see below), whose sum is σ = 35993528064. Its totient is φ = 6921829440.

The previous prime is 16655655553. The next prime is 16655655563. The reversal of 16655655555 is 55555655661.

16655655555 is a `hidden beast` number, since 16 + 65 + 565 + 5 + 5 + 5 + 5 = 666.

It is not a de Polignac number, because 16655655555 - 2¹ = 16655655553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16655655553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2399949 + ... + 2406878.

It is an arithmetic number, because the mean of its divisors is an integer number (749865168).

Almost surely, 2^16655655555 is an apocalyptic number.

16655655555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16655655555 is an abundant number, since it is smaller than the sum of its proper divisors (19337872509).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16655655555 is a wasteful number, since it uses less digits than its factorization.

16655655555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4806856 (or 4806853 counting only the distinct ones).

The product of its digits is 16875000, while the sum is 54.

It can be divided in two parts, 166556 and 55555, that added together give a triangular number (222111 = T₆₆₆).

The spelling of 16655655555 in words is "sixteen billion, six hundred fifty-five million, six hundred fifty-five thousand, five hundred fifty-five".