16605555613 has 8 divisors (see below), whose sum is σ = 17622411840. Its totient is φ = 15593150400.

The previous prime is 16605555611. The next prime is 16605555667. The reversal of 16605555613 is 31655550661.

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 16605555613 - 2¹ = 16605555611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16605555613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16605555611) 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, 1105063 + ... + 1119988.

It is an arithmetic number, because the mean of its divisors is an integer number (2202801480).

Almost surely, 2^16605555613 is an apocalyptic number.

It is an amenable number.

16605555613 is a deficient number, since it is larger than the sum of its proper divisors (1016856227).

16605555613 is a wasteful number, since it uses less digits than its factorization.

16605555613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225507.

The product of its (nonzero) digits is 405000, while the sum is 43.

The spelling of 16605555613 in words is "sixteen billion, six hundred five million, five hundred fifty-five thousand, six hundred thirteen".