16538664 has 32 divisors (see below), whose sum is σ = 43524000. Its totient is φ = 5222592.

The previous prime is 16538659. The next prime is 16538677. The reversal of 16538664 is 46683561.

16538664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×16538664³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17679 + ... + 18590.

It is an arithmetic number, because the mean of its divisors is an integer number (1360125).

Almost surely, 2^16538664 is an apocalyptic number.

It is an amenable number.

16538664 is an abundant number, since it is smaller than the sum of its proper divisors (26985336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16538664 is a wasteful number, since it uses less digits than its factorization.

16538664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36297 (or 36293 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 16538664 is about 4066.7756269556. The cubic root of 16538664 is about 254.7808651809.

The spelling of 16538664 in words is "sixteen million, five hundred thirty-eight thousand, six hundred sixty-four".