25748660225 has 12 divisors (see below), whose sum is σ = 32161396524. Its totient is φ = 20448568320.

The previous prime is 25748660219. The next prime is 25748660257. The reversal of 25748660225 is 52206684752.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 10233601 + 25738426624 = 3199^2 + 160432^2 .

It is not a de Polignac number, because 25748660225 - 2²⁰ = 25747611649 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25748660225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3755504 + ... + 3762353.

It is an arithmetic number, because the mean of its divisors is an integer number (2680116377).

Almost surely, 2^25748660225 is an apocalyptic number.

25748660225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25748660225 is a deficient number, since it is larger than the sum of its proper divisors (6412736299).

25748660225 is a wasteful number, since it uses less digits than its factorization.

25748660225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7518004 (or 7517999 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 47.

The spelling of 25748660225 in words is "twenty-five billion, seven hundred forty-eight million, six hundred sixty thousand, two hundred twenty-five".