25544400325 has 6 divisors (see below), whose sum is σ = 31675056434. Its totient is φ = 20435520240.

The previous prime is 25544400319. The next prime is 25544400347. The reversal of 25544400325 is 52300444552.

It can be written as a sum of positive squares in 3 ways, for example, as 1168135684 + 24376264641 = 34178^2 + 156129^2 .

It is not a de Polignac number, because 25544400325 - 2⁵ = 25544400293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 510887982 + ... + 510888031.

Almost surely, 2^25544400325 is an apocalyptic number.

25544400325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25544400325 is a deficient number, since it is larger than the sum of its proper divisors (6130656109).

25544400325 is a wasteful number, since it uses less digits than its factorization.

25544400325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021776023 (or 1021776018 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 34.

Adding to 25544400325 its reverse (52300444552), we get a palindrome (77844844877).

The spelling of 25544400325 in words is "twenty-five billion, five hundred forty-four million, four hundred thousand, three hundred twenty-five".