25350775949 has 2 divisors, whose sum is σ = 25350775950. Its totient is φ = 25350775948.

The previous prime is 25350775907. The next prime is 25350776041. The reversal of 25350775949 is 94957705352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25294675849 + 56100100 = 159043^2 + 7490^2 .

It is a cyclic number.

It is not a de Polignac number, because 25350775949 - 2²⁰ = 25349727373 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25350775894 and 25350775903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25350775249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12675387974 + 12675387975.

It is an arithmetic number, because the mean of its divisors is an integer number (12675387975).

Almost surely, 2^25350775949 is an apocalyptic number.

It is an amenable number.

25350775949 is a deficient number, since it is larger than the sum of its proper divisors (1).

25350775949 is an equidigital number, since it uses as much as digits as its factorization.

25350775949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11907000, while the sum is 56.

The spelling of 25350775949 in words is "twenty-five billion, three hundred fifty million, seven hundred seventy-five thousand, nine hundred forty-nine".