25442140013 has 2 divisors, whose sum is σ = 25442140014. Its totient is φ = 25442140012.

The previous prime is 25442140001. The next prime is 25442140039. The reversal of 25442140013 is 31004124452.

It is an a-pointer prime, because the next prime (25442140039) can be obtained adding 25442140013 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20666362564 + 4775777449 = 143758^2 + 69107^2 .

It is a cyclic number.

It is not a de Polignac number, because 25442140013 - 2⁸ = 25442139757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25442146013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12721070006 + 12721070007.

It is an arithmetic number, because the mean of its divisors is an integer number (12721070007).

Almost surely, 2^25442140013 is an apocalyptic number.

It is an amenable number.

25442140013 is a deficient number, since it is larger than the sum of its proper divisors (1).

25442140013 is an equidigital number, since it uses as much as digits as its factorization.

25442140013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 25442140013 its reverse (31004124452), we get a palindrome (56446264465).

The spelling of 25442140013 in words is "twenty-five billion, four hundred forty-two million, one hundred forty thousand, thirteen".