16323691325 has 6 divisors (see below), whose sum is σ = 20241377274. Its totient is φ = 13058953040.

The previous prime is 16323691283. The next prime is 16323691327. The reversal of 16323691325 is 52319632361.

It can be written as a sum of positive squares in 3 ways, for example, as 2334242596 + 13989448729 = 48314^2 + 118277^2 .

It is not a de Polignac number, because 16323691325 - 2¹⁸ = 16323429181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16323691327) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 326473802 + ... + 326473851.

It is an arithmetic number, because the mean of its divisors is an integer number (3373562879).

Almost surely, 2^16323691325 is an apocalyptic number.

It is an amenable number.

16323691325 is a deficient number, since it is larger than the sum of its proper divisors (3917685949).

16323691325 is an equidigital number, since it uses as much as digits as its factorization.

16323691325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652947663 (or 652947658 counting only the distinct ones).

The product of its digits is 174960, while the sum is 41.

The spelling of 16323691325 in words is "sixteen billion, three hundred twenty-three million, six hundred ninety-one thousand, three hundred twenty-five".