16442564 has 12 divisors (see below), whose sum is σ = 28803600. Its totient is φ = 8212968.

The previous prime is 16442521. The next prime is 16442609. The reversal of 16442564 is 46524461.

It is a super-3 number, since 3×16442564³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16442564.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5207 + ... + 7745.

It is an arithmetic number, because the mean of its divisors is an integer number (2400300).

Almost surely, 2^16442564 is an apocalyptic number.

It is an amenable number.

16442564 is a deficient number, since it is larger than the sum of its proper divisors (12361036).

16442564 is a wasteful number, since it uses less digits than its factorization.

16442564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4162 (or 4160 counting only the distinct ones).

The product of its digits is 23040, while the sum is 32.

The square root of 16442564 is about 4054.9431561984. The cubic root of 16442564 is about 254.2864274573.

The spelling of 16442564 in words is "sixteen million, four hundred forty-two thousand, five hundred sixty-four".