25234051991 has 2 divisors, whose sum is σ = 25234051992. Its totient is φ = 25234051990.

The previous prime is 25234051961. The next prime is 25234052089. The reversal of 25234051991 is 19915043252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25234051991 - 2¹⁰ = 25234050967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25234051951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12617025995 + 12617025996.

It is an arithmetic number, because the mean of its divisors is an integer number (12617025996).

Almost surely, 2^25234051991 is an apocalyptic number.

25234051991 is a deficient number, since it is larger than the sum of its proper divisors (1).

25234051991 is an equidigital number, since it uses as much as digits as its factorization.

25234051991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 41.

The spelling of 25234051991 in words is "twenty-five billion, two hundred thirty-four million, fifty-one thousand, nine hundred ninety-one".