25822138481 has 2 divisors, whose sum is σ = 25822138482. Its totient is φ = 25822138480.

The previous prime is 25822138453. The next prime is 25822138487. The reversal of 25822138481 is 18483122852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22041856225 + 3780282256 = 148465^2 + 61484^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25822138481 is a prime.

It is a super-2 number, since 2×25822138481² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25822138487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12911069240 + 12911069241.

It is an arithmetic number, because the mean of its divisors is an integer number (12911069241).

Almost surely, 2^25822138481 is an apocalyptic number.

It is an amenable number.

25822138481 is a deficient number, since it is larger than the sum of its proper divisors (1).

25822138481 is an equidigital number, since it uses as much as digits as its factorization.

25822138481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 245760, while the sum is 44.

The spelling of 25822138481 in words is "twenty-five billion, eight hundred twenty-two million, one hundred thirty-eight thousand, four hundred eighty-one".