25788749999 has 2 divisors, whose sum is σ = 25788750000. Its totient is φ = 25788749998.

The previous prime is 25788749869. The next prime is 25788750089. The reversal of 25788749999 is 99994788752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25788749999 - 2¹² = 25788745903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25788749299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12894374999 + 12894375000.

It is an arithmetic number, because the mean of its divisors is an integer number (12894375000).

Almost surely, 2^25788749999 is an apocalyptic number.

25788749999 is a deficient number, since it is larger than the sum of its proper divisors (1).

25788749999 is an equidigital number, since it uses as much as digits as its factorization.

25788749999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 823011840, while the sum is 77.

The spelling of 25788749999 in words is "twenty-five billion, seven hundred eighty-eight million, seven hundred forty-nine thousand, nine hundred ninety-nine".