16559457 has 4 divisors (see below), whose sum is σ = 22079280. Its totient is φ = 11039636.

The previous prime is 16559447. The next prime is 16559483. The reversal of 16559457 is 75495561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16559457 - 2⁴ = 16559441 is a prime.

It is a super-2 number, since 2×16559457² = 548431232269698, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16559447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2759907 + ... + 2759912.

It is an arithmetic number, because the mean of its divisors is an integer number (5519820).

Almost surely, 2^16559457 is an apocalyptic number.

It is an amenable number.

16559457 is a deficient number, since it is larger than the sum of its proper divisors (5519823).

16559457 is an equidigital number, since it uses as much as digits as its factorization.

16559457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5519822.

The product of its digits is 189000, while the sum is 42.

The square root of 16559457 is about 4069.3312718431. The cubic root of 16559457 is about 254.8875936717.

The spelling of 16559457 in words is "sixteen million, five hundred fifty-nine thousand, four hundred fifty-seven".