16551116555 has 16 divisors (see below), whose sum is σ = 19973472480. Its totient is φ = 13166293248.

The previous prime is 16551116551. The next prime is 16551116563. The reversal of 16551116555 is 55561115561.

It is a cyclic number.

It is not a de Polignac number, because 16551116555 - 2² = 16551116551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16551116551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 891356 + ... + 909734.

It is an arithmetic number, because the mean of its divisors is an integer number (1248342030).

Almost surely, 2^16551116555 is an apocalyptic number.

16551116555 is a deficient number, since it is larger than the sum of its proper divisors (3422355925).

16551116555 is a wasteful number, since it uses less digits than its factorization.

16551116555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19390.

The product of its digits is 112500, while the sum is 41.

The spelling of 16551116555 in words is "sixteen billion, five hundred fifty-one million, one hundred sixteen thousand, five hundred fifty-five".