25645646325 has 48 divisors (see below), whose sum is σ = 45725476160. Its totient is φ = 12608110080.

The previous prime is 25645646317. The next prime is 25645646371. The reversal of 25645646325 is 52364654652.

It is not a de Polignac number, because 25645646325 - 2³ = 25645646317 is a prime.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 702729 + ... + 738321.

Almost surely, 2^25645646325 is an apocalyptic number.

25645646325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25645646325 is a deficient number, since it is larger than the sum of its proper divisors (20079829835).

25645646325 is a wasteful number, since it uses less digits than its factorization.

25645646325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36358 (or 36353 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 48.

The spelling of 25645646325 in words is "twenty-five billion, six hundred forty-five million, six hundred forty-six thousand, three hundred twenty-five".