16555897 has 8 divisors (see below), whose sum is σ = 18028800. Its totient is φ = 15143184.

The previous prime is 16555867. The next prime is 16555907. The reversal of 16555897 is 79855561.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16555897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16555867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14473 + ... + 15574.

It is an arithmetic number, because the mean of its divisors is an integer number (2253600).

Almost surely, 2^16555897 is an apocalyptic number.

It is an amenable number.

16555897 is a deficient number, since it is larger than the sum of its proper divisors (1472903).

16555897 is a wasteful number, since it uses less digits than its factorization.

16555897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30095.

The product of its digits is 378000, while the sum is 46.

The square root of 16555897 is about 4068.8938300231. The cubic root of 16555897 is about 254.8693268717.

The spelling of 16555897 in words is "sixteen million, five hundred fifty-five thousand, eight hundred ninety-seven".