16198505 has 8 divisors (see below), whose sum is σ = 19506312. Its totient is φ = 12913408.

The previous prime is 16198477. The next prime is 16198513. The reversal of 16198505 is 50589161.

It can be written as a sum of positive squares in 4 ways, for example, as 2795584 + 13402921 = 1672^2 + 3661^2 .

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 16198505 - 2⁸ = 16198249 is a prime.

It is a Duffinian 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, 4064 + ... + 6993.

It is an arithmetic number, because the mean of its divisors is an integer number (2438289).

Almost surely, 2^16198505 is an apocalyptic number.

It is an amenable number.

16198505 is a deficient number, since it is larger than the sum of its proper divisors (3307807).

16198505 is a wasteful number, since it uses less digits than its factorization.

16198505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11355.

The product of its (nonzero) digits is 10800, while the sum is 35.

The square root of 16198505 is about 4024.7366373466. The cubic root of 16198505 is about 253.0220158212.

The spelling of 16198505 in words is "sixteen million, one hundred ninety-eight thousand, five hundred five".