16320557 has 8 divisors (see below), whose sum is σ = 18055872. Its totient is φ = 14627200.

The previous prime is 16320529. The next prime is 16320569. The reversal of 16320557 is 75502361.

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-16320557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16320517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9668 + ... + 11229.

It is an arithmetic number, because the mean of its divisors is an integer number (2256984).

Almost surely, 2^16320557 is an apocalyptic number.

It is an amenable number.

16320557 is a deficient number, since it is larger than the sum of its proper divisors (1735315).

16320557 is a wasteful number, since it uses less digits than its factorization.

16320557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20979.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 16320557 is about 4039.8709137793. The cubic root of 16320557 is about 253.6559139002.

The spelling of 16320557 in words is "sixteen million, three hundred twenty thousand, five hundred fifty-seven".