25414526549 has 2 divisors, whose sum is σ = 25414526550. Its totient is φ = 25414526548.

The previous prime is 25414526539. The next prime is 25414526551. The reversal of 25414526549 is 94562541452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24229101649 + 1185424900 = 155657^2 + 34430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25414526549 is a prime.

Together with 25414526551, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25414526519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12707263274 + 12707263275.

It is an arithmetic number, because the mean of its divisors is an integer number (12707263275).

Almost surely, 2^25414526549 is an apocalyptic number.

It is an amenable number.

25414526549 is a deficient number, since it is larger than the sum of its proper divisors (1).

25414526549 is an equidigital number, since it uses as much as digits as its factorization.

25414526549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728000, while the sum is 47.

The spelling of 25414526549 in words is "twenty-five billion, four hundred fourteen million, five hundred twenty-six thousand, five hundred forty-nine".