16611006555 has 160 divisors (see below), whose sum is σ = 35470733760. Its totient is φ = 7330590720.

The previous prime is 16611006539. The next prime is 16611006583. The reversal of 16611006555 is 55560011661.

It is not a de Polignac number, because 16611006555 - 2⁴ = 16611006539 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 4225831 + ... + 4229759.

It is an arithmetic number, because the mean of its divisors is an integer number (221692086).

Almost surely, 2^16611006555 is an apocalyptic number.

16611006555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16611006555 is an abundant number, since it is smaller than the sum of its proper divisors (18859727205).

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

16611006555 is a wasteful number, since it uses less digits than its factorization.

16611006555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4043 (or 4034 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 16611006555 in words is "sixteen billion, six hundred eleven million, six thousand, five hundred fifty-five".