25340240449 has 2 divisors, whose sum is σ = 25340240450. Its totient is φ = 25340240448.

The previous prime is 25340240447. The next prime is 25340240461. The reversal of 25340240449 is 94404204352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17265960000 + 8074280449 = 131400^2 + 89857^2 .

It is a cyclic number.

It is not a de Polignac number, because 25340240449 - 2¹ = 25340240447 is a prime.

Together with 25340240447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25340240447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12670120224 + 12670120225.

It is an arithmetic number, because the mean of its divisors is an integer number (12670120225).

Almost surely, 2^25340240449 is an apocalyptic number.

It is an amenable number.

25340240449 is a deficient number, since it is larger than the sum of its proper divisors (1).

25340240449 is an equidigital number, since it uses as much as digits as its factorization.

25340240449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 37.

The spelling of 25340240449 in words is "twenty-five billion, three hundred forty million, two hundred forty thousand, four hundred forty-nine".