16553799 has 12 divisors (see below), whose sum is σ = 24149112. Its totient is φ = 10926000.

The previous prime is 16553773. The next prime is 16553819. The reversal of 16553799 is 99735561.

16553799 is a `hidden beast` number, since 1 + 6 + 553 + 7 + 99 = 666.

It is not a de Polignac number, because 16553799 - 2¹⁵ = 16521031 is a prime.

It is a super-2 number, since 2×16553799² = 548056522664802, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16553599) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8197 + ... + 10014.

It is an arithmetic number, because the mean of its divisors is an integer number (2012426).

Almost surely, 2^16553799 is an apocalyptic number.

16553799 is a deficient number, since it is larger than the sum of its proper divisors (7595313).

16553799 is a wasteful number, since it uses less digits than its factorization.

16553799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18318 (or 18315 counting only the distinct ones).

The product of its digits is 255150, while the sum is 45.

The square root of 16553799 is about 4068.6360122282. The cubic root of 16553799 is about 254.8585605481.

The spelling of 16553799 in words is "sixteen million, five hundred fifty-three thousand, seven hundred ninety-nine".