16520506125 has 96 divisors (see below), whose sum is σ = 29790408960. Its totient is φ = 8105574400.

The previous prime is 16520506111. The next prime is 16520506129. The reversal of 16520506125 is 52160502561.

It is not a de Polignac number, because 16520506125 - 2⁹ = 16520505613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16520506129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 64281997 + ... + 64282253.

It is an arithmetic number, because the mean of its divisors is an integer number (310316760).

Almost surely, 2^16520506125 is an apocalyptic number.

16520506125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16520506125 is a deficient number, since it is larger than the sum of its proper divisors (13269902835).

16520506125 is an equidigital number, since it uses as much as digits as its factorization.

16520506125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

The spelling of 16520506125 in words is "sixteen billion, five hundred twenty million, five hundred six thousand, one hundred twenty-five".