25550392349 has 2 divisors, whose sum is σ = 25550392350. Its totient is φ = 25550392348.

The previous prime is 25550392339. The next prime is 25550392391. The reversal of 25550392349 is 94329305552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25241265625 + 309126724 = 158875^2 + 17582^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25550392349 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25550392339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12775196174 + 12775196175.

It is an arithmetic number, because the mean of its divisors is an integer number (12775196175).

Almost surely, 2^25550392349 is an apocalyptic number.

It is an amenable number.

25550392349 is a deficient number, since it is larger than the sum of its proper divisors (1).

25550392349 is an equidigital number, since it uses as much as digits as its factorization.

25550392349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458000, while the sum is 47.

The spelling of 25550392349 in words is "twenty-five billion, five hundred fifty million, three hundred ninety-two thousand, three hundred forty-nine".