16505164 has 24 divisors (see below), whose sum is σ = 32937408. Its totient is φ = 7169280.

The previous prime is 16505161. The next prime is 16505171. The reversal of 16505164 is 46150561.

16505164 = T₁₅₈₇ + T₁₅₈₈ + ... + T₁₅₉₉.

It is not an unprimeable number, because it can be changed into a prime (16505161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8452 + ... + 10219.

It is an arithmetic number, because the mean of its divisors is an integer number (1372392).

Almost surely, 2^16505164 is an apocalyptic number.

It is an amenable number.

16505164 is a deficient number, since it is larger than the sum of its proper divisors (16432244).

16505164 is a wasteful number, since it uses less digits than its factorization.

16505164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18705 (or 18703 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 16505164 is about 4062.6547970508. The cubic root of 16505164 is about 254.6087245475.

The spelling of 16505164 in words is "sixteen million, five hundred five thousand, one hundred sixty-four".