25134614581 has 2 divisors, whose sum is σ = 25134614582. Its totient is φ = 25134614580.

The previous prime is 25134614543. The next prime is 25134614591. The reversal of 25134614581 is 18541643152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21529692900 + 3604921681 = 146730^2 + 60041^2 .

It is a cyclic number.

It is not a de Polignac number, because 25134614581 - 2²¹ = 25132517429 is a prime.

It is a super-2 number, since 2×25134614581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25134614591) 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 as a sum of consecutive naturals, namely, 12567307290 + 12567307291.

It is an arithmetic number, because the mean of its divisors is an integer number (12567307291).

Almost surely, 2^25134614581 is an apocalyptic number.

It is an amenable number.

25134614581 is a deficient number, since it is larger than the sum of its proper divisors (1).

25134614581 is an equidigital number, since it uses as much as digits as its factorization.

25134614581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 115200, while the sum is 40.

The spelling of 25134614581 in words is "twenty-five billion, one hundred thirty-four million, six hundred fourteen thousand, five hundred eighty-one".