16605105551 has 8 divisors (see below), whose sum is σ = 16814397600. Its totient is φ = 16396738272.

The previous prime is 16605105547. The next prime is 16605105571. The reversal of 16605105551 is 15550150661.

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 16605105551 - 2² = 16605105547 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 (16605105541) 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, 195020 + ... + 266913.

It is an arithmetic number, because the mean of its divisors is an integer number (2101799700).

Almost surely, 2^16605105551 is an apocalyptic number.

16605105551 is a deficient number, since it is larger than the sum of its proper divisors (209292049).

16605105551 is a wasteful number, since it uses less digits than its factorization.

16605105551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462385.

The product of its (nonzero) digits is 22500, while the sum is 35.

The spelling of 16605105551 in words is "sixteen billion, six hundred five million, one hundred five thousand, five hundred fifty-one".