16505210504 has 24 divisors (see below), whose sum is σ = 32351312910. Its totient is φ = 7893794304.

The previous prime is 16505210503. The next prime is 16505210549. The reversal of 16505210504 is 40501250561.

It is a happy number.

16505210504 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 12857292100 + 3647918404 = 113390^2 + 60398^2 .

It is not an unprimeable number, because it can be changed into a prime (16505210503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1945817 + ... + 1954280.

Almost surely, 2^16505210504 is an apocalyptic number.

It is an amenable number.

16505210504 is a deficient number, since it is larger than the sum of its proper divisors (15846102406).

16505210504 is a wasteful number, since it uses less digits than its factorization.

16505210504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3900149 (or 3900122 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

The spelling of 16505210504 in words is "sixteen billion, five hundred five million, two hundred ten thousand, five hundred four".