25435917841 has 2 divisors, whose sum is σ = 25435917842. Its totient is φ = 25435917840.

The previous prime is 25435917821. The next prime is 25435917847. The reversal of 25435917841 is 14871953452.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17299877841 + 8136040000 = 131529^2 + 90200^2 .

It is a cyclic number.

It is not a de Polignac number, because 25435917841 - 2⁷ = 25435917713 is a prime.

It is not a weakly prime, because it can be changed into another prime (25435917847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12717958920 + 12717958921.

It is an arithmetic number, because the mean of its divisors is an integer number (12717958921).

Almost surely, 2^25435917841 is an apocalyptic number.

It is an amenable number.

25435917841 is a deficient number, since it is larger than the sum of its proper divisors (1).

25435917841 is an equidigital number, since it uses as much as digits as its factorization.

25435917841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1209600, while the sum is 49.

The spelling of 25435917841 in words is "twenty-five billion, four hundred thirty-five million, nine hundred seventeen thousand, eight hundred forty-one".