25020036449 has 2 divisors, whose sum is σ = 25020036450. Its totient is φ = 25020036448.

The previous prime is 25020036439. The next prime is 25020036469. The reversal of 25020036449 is 94463002052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17600798224 + 7419238225 = 132668^2 + 86135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25020036449 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25020036439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12510018224 + 12510018225.

It is an arithmetic number, because the mean of its divisors is an integer number (12510018225).

Almost surely, 2^25020036449 is an apocalyptic number.

It is an amenable number.

25020036449 is a deficient number, since it is larger than the sum of its proper divisors (1).

25020036449 is an equidigital number, since it uses as much as digits as its factorization.

25020036449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 25020036449 in words is "twenty-five billion, twenty million, thirty-six thousand, four hundred forty-nine".