25041440449 has 2 divisors, whose sum is σ = 25041440450. Its totient is φ = 25041440448.

The previous prime is 25041440429. The next prime is 25041440539. The reversal of 25041440449 is 94404414052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22102174224 + 2939266225 = 148668^2 + 54215^2 .

It is a cyclic number.

It is not a de Polignac number, because 25041440449 - 2¹⁹ = 25040916161 is a prime.

It is not a weakly prime, because it can be changed into another prime (25041440429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12520720224 + 12520720225.

It is an arithmetic number, because the mean of its divisors is an integer number (12520720225).

Almost surely, 2^25041440449 is an apocalyptic number.

It is an amenable number.

25041440449 is a deficient number, since it is larger than the sum of its proper divisors (1).

25041440449 is an equidigital number, since it uses as much as digits as its factorization.

25041440449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 92160, while the sum is 37.

The spelling of 25041440449 in words is "twenty-five billion, forty-one million, four hundred forty thousand, four hundred forty-nine".