16209765325 has 24 divisors (see below), whose sum is σ = 22392707400. Its totient is φ = 11557512960.

The previous prime is 16209765323. The next prime is 16209765329. The reversal of 16209765325 is 52356790261.

It can be written as a sum of positive squares in 12 ways, for example, as 4088195721 + 12121569604 = 63939^2 + 110098^2 .

It is not a de Polignac number, because 16209765325 - 2¹ = 16209765323 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16209765323) 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 23 ways as a sum of consecutive naturals, for example, 850510 + ... + 869359.

It is an arithmetic number, because the mean of its divisors is an integer number (933029475).

Almost surely, 2^16209765325 is an apocalyptic number.

It is an amenable number.

16209765325 is a deficient number, since it is larger than the sum of its proper divisors (6182942075).

16209765325 is a wasteful number, since it uses less digits than its factorization.

16209765325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1719921 (or 1719916 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 46.

The spelling of 16209765325 in words is "sixteen billion, two hundred nine million, seven hundred sixty-five thousand, three hundred twenty-five".