16611005564 has 6 divisors (see below), whose sum is σ = 29069259744. Its totient is φ = 8305502780.

The previous prime is 16611005561. The next prime is 16611005573. The reversal of 16611005564 is 46550011661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16611005561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2076375692 + ... + 2076375699.

It is an arithmetic number, because the mean of its divisors is an integer number (4844876624).

Almost surely, 2^16611005564 is an apocalyptic number.

It is an amenable number.

16611005564 is a deficient number, since it is larger than the sum of its proper divisors (12458254180).

16611005564 is a wasteful number, since it uses less digits than its factorization.

16611005564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4152751395 (or 4152751393 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 16611005564 in words is "sixteen billion, six hundred eleven million, five thousand, five hundred sixty-four".