16698555605 has 8 divisors (see below), whose sum is σ = 20040049464. Its totient is φ = 13357656000.

The previous prime is 16698555551. The next prime is 16698555619. The reversal of 16698555605 is 50655589661.

It can be written as a sum of positive squares in 4 ways, for example, as 1800644356 + 14897911249 = 42434^2 + 122057^2 .

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

It is not a de Polignac number, because 16698555605 - 2¹⁶ = 16698490069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84206 + ... + 201215.

It is an arithmetic number, because the mean of its divisors is an integer number (2505006183).

Almost surely, 2^16698555605 is an apocalyptic number.

It is an amenable number.

16698555605 is a deficient number, since it is larger than the sum of its proper divisors (3341493859).

16698555605 is a wasteful number, since it uses less digits than its factorization.

16698555605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297127.

The product of its (nonzero) digits is 9720000, while the sum is 56.

The spelling of 16698555605 in words is "sixteen billion, six hundred ninety-eight million, five hundred fifty-five thousand, six hundred five".