25545309241 has 9 divisors (see below), whose sum is σ = 25682373549. Its totient is φ = 25408975104.

The previous prime is 25545309227. The next prime is 25545309247. The reversal of 25545309241 is 14290354552.

The square root of 25545309241 is 159829.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2919132841 + 22626176400 = 54029^2 + 150420^2 .

It is not a de Polignac number, because 25545309241 - 2⁷ = 25545309113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25545309194 and 25545309203.

It is not an unprimeable number, because it can be changed into a prime (25545309247) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 44272345 + ... + 44272921.

It is an arithmetic number, because the mean of its divisors is an integer number (2853597061).

Almost surely, 2^25545309241 is an apocalyptic number.

25545309241 is the 159829-th square number.

25545309241 is the 79915-th centered octagonal number.

It is an amenable number.

25545309241 is a deficient number, since it is larger than the sum of its proper divisors (137064308).

25545309241 is an frugal number, since it uses more digits than its factorization.

25545309241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1708 (or 854 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 25545309241 in words is "twenty-five billion, five hundred forty-five million, three hundred nine thousand, two hundred forty-one".