16551616511 has 8 divisors (see below), whose sum is σ = 16601785200. Its totient is φ = 16501479552.

The previous prime is 16551616481. The next prime is 16551616531. The reversal of 16551616511 is 11561615561.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16551616511 - 2⁶ = 16551616447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16551616531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1408940 + ... + 1420638.

It is an arithmetic number, because the mean of its divisors is an integer number (2075223150).

Almost surely, 2^16551616511 is an apocalyptic number.

16551616511 is a deficient number, since it is larger than the sum of its proper divisors (50168689).

16551616511 is a wasteful number, since it uses less digits than its factorization.

16551616511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15865.

The product of its digits is 27000, while the sum is 38.

The spelling of 16551616511 in words is "sixteen billion, five hundred fifty-one million, six hundred sixteen thousand, five hundred eleven".