16400625325 has 24 divisors (see below), whose sum is σ = 23736552192. Its totient is φ = 11006857920.

The previous prime is 16400625323. The next prime is 16400625331. The reversal of 16400625325 is 52352600461.

It is not a de Polignac number, because 16400625325 - 2¹ = 16400625323 is a prime.

It is a super-2 number, since 2×16400625325² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16400625323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 988774 + ... + 1005223.

It is an arithmetic number, because the mean of its divisors is an integer number (989023008).

Almost surely, 2^16400625325 is an apocalyptic number.

It is an amenable number.

16400625325 is a deficient number, since it is larger than the sum of its proper divisors (7335926867).

16400625325 is a wasteful number, since it uses less digits than its factorization.

16400625325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994061 (or 1994056 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The spelling of 16400625325 in words is "sixteen billion, four hundred million, six hundred twenty-five thousand, three hundred twenty-five".