25511907251 has 2 divisors, whose sum is σ = 25511907252. Its totient is φ = 25511907250.

The previous prime is 25511907247. The next prime is 25511907269. The reversal of 25511907251 is 15270911552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25511907251 - 2² = 25511907247 is a prime.

It is not a weakly prime, because it can be changed into another prime (25511907271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12755953625 + 12755953626.

It is an arithmetic number, because the mean of its divisors is an integer number (12755953626).

Almost surely, 2^25511907251 is an apocalyptic number.

25511907251 is a deficient number, since it is larger than the sum of its proper divisors (1).

25511907251 is an equidigital number, since it uses as much as digits as its factorization.

25511907251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31500, while the sum is 38.

The spelling of 25511907251 in words is "twenty-five billion, five hundred eleven million, nine hundred seven thousand, two hundred fifty-one".