25305145541 has 12 divisors (see below), whose sum is σ = 29013281892. Its totient is φ = 21984558336.

The previous prime is 25305145531. The next prime is 25305145549. The reversal of 25305145541 is 14554150352.

It can be written as a sum of positive squares in 6 ways, for example, as 1562500 + 25303583041 = 1250^2 + 159071^2 .

It is not a de Polignac number, because 25305145541 - 2⁶ = 25305145477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25305145549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4401086 + ... + 4406831.

It is an arithmetic number, because the mean of its divisors is an integer number (2417773491).

Almost surely, 2^25305145541 is an apocalyptic number.

It is an amenable number.

25305145541 is a deficient number, since it is larger than the sum of its proper divisors (3708136351).

25305145541 is a wasteful number, since it uses less digits than its factorization.

25305145541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8807960 (or 8807947 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 35.

Adding to 25305145541 its reverse (14554150352), we get a palindrome (39859295893).

The spelling of 25305145541 in words is "twenty-five billion, three hundred five million, one hundred forty-five thousand, five hundred forty-one".