25115323543 has 2 divisors, whose sum is σ = 25115323544. Its totient is φ = 25115323542.

The previous prime is 25115323523. The next prime is 25115323549. The reversal of 25115323543 is 34532351152.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25115323543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25115323499 and 25115323508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25115323549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12557661771 + 12557661772.

It is an arithmetic number, because the mean of its divisors is an integer number (12557661772).

Almost surely, 2^25115323543 is an apocalyptic number.

25115323543 is a deficient number, since it is larger than the sum of its proper divisors (1).

25115323543 is an equidigital number, since it uses as much as digits as its factorization.

25115323543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54000, while the sum is 34.

Adding to 25115323543 its reverse (34532351152), we get a palindrome (59647674695).

The spelling of 25115323543 in words is "twenty-five billion, one hundred fifteen million, three hundred twenty-three thousand, five hundred forty-three".