25115340533 has 2 divisors, whose sum is σ = 25115340534. Its totient is φ = 25115340532.

The previous prime is 25115340529. The next prime is 25115340539. The reversal of 25115340533 is 33504351152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23042632804 + 2072707729 = 151798^2 + 45527^2 .

It is a cyclic number.

It is not a de Polignac number, because 25115340533 - 2² = 25115340529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25115340533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25115340539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12557670266 + 12557670267.

It is an arithmetic number, because the mean of its divisors is an integer number (12557670267).

Almost surely, 2^25115340533 is an apocalyptic number.

It is an amenable number.

25115340533 is a deficient number, since it is larger than the sum of its proper divisors (1).

25115340533 is an equidigital number, since it uses as much as digits as its factorization.

25115340533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 32.

Adding to 25115340533 its reverse (33504351152), we get a palindrome (58619691685).

The spelling of 25115340533 in words is "twenty-five billion, one hundred fifteen million, three hundred forty thousand, five hundred thirty-three".