25484936881 has 2 divisors, whose sum is σ = 25484936882. Its totient is φ = 25484936880.

The previous prime is 25484936809. The next prime is 25484936887. The reversal of 25484936881 is 18863948452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25242854400 + 242082481 = 158880^2 + 15559^2 .

It is a cyclic number.

It is not a de Polignac number, because 25484936881 - 2¹¹ = 25484934833 is a prime.

It is a super-2 number, since 2×25484936881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25484936887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12742468440 + 12742468441.

It is an arithmetic number, because the mean of its divisors is an integer number (12742468441).

Almost surely, 2^25484936881 is an apocalyptic number.

It is an amenable number.

25484936881 is a deficient number, since it is larger than the sum of its proper divisors (1).

25484936881 is an equidigital number, since it uses as much as digits as its factorization.

25484936881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13271040, while the sum is 58.

The spelling of 25484936881 in words is "twenty-five billion, four hundred eighty-four million, nine hundred thirty-six thousand, eight hundred eighty-one".