25118884457 has 2 divisors, whose sum is σ = 25118884458. Its totient is φ = 25118884456.

The previous prime is 25118884421. The next prime is 25118884459. The reversal of 25118884457 is 75448881152.

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., 24612589456 + 506295001 = 156884^2 + 22501^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25118884457 is a prime.

Together with 25118884459, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25118884399 and 25118884408.

It is not a weakly prime, because it can be changed into another prime (25118884459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12559442228 + 12559442229.

It is an arithmetic number, because the mean of its divisors is an integer number (12559442229).

Almost surely, 2^25118884457 is an apocalyptic number.

It is an amenable number.

25118884457 is a deficient number, since it is larger than the sum of its proper divisors (1).

25118884457 is an equidigital number, since it uses as much as digits as its factorization.

25118884457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2867200, while the sum is 53.

The spelling of 25118884457 in words is "twenty-five billion, one hundred eighteen million, eight hundred eighty-four thousand, four hundred fifty-seven".