16505210525 has 24 divisors (see below), whose sum is σ = 20626358400. Its totient is φ = 13101208640.

The previous prime is 16505210503. The next prime is 16505210549. The reversal of 16505210525 is 52501250561.

It is not a de Polignac number, because 16505210525 - 2⁸ = 16505210269 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16505210491 and 16505210500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4553864 + ... + 4557486.

It is an arithmetic number, because the mean of its divisors is an integer number (859431600).

Almost surely, 2^16505210525 is an apocalyptic number.

It is an amenable number.

16505210525 is a deficient number, since it is larger than the sum of its proper divisors (4121147875).

16505210525 is a wasteful number, since it uses less digits than its factorization.

16505210525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5005 (or 5000 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 32.

The spelling of 16505210525 in words is "sixteen billion, five hundred five million, two hundred ten thousand, five hundred twenty-five".