25050442649 has 2 divisors, whose sum is σ = 25050442650. Its totient is φ = 25050442648.

The previous prime is 25050442609. The next prime is 25050442657. The reversal of 25050442649 is 94624405052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15090402649 + 9960040000 = 122843^2 + 99800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25050442649 is a prime.

It is not a weakly prime, because it can be changed into another prime (25050442609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12525221324 + 12525221325.

It is an arithmetic number, because the mean of its divisors is an integer number (12525221325).

Almost surely, 2^25050442649 is an apocalyptic number.

It is an amenable number.

25050442649 is a deficient number, since it is larger than the sum of its proper divisors (1).

25050442649 is an equidigital number, since it uses as much as digits as its factorization.

25050442649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 25050442649 in words is "twenty-five billion, fifty million, four hundred forty-two thousand, six hundred forty-nine".