25888963993 has 2 divisors, whose sum is σ = 25888963994. Its totient is φ = 25888963992.

The previous prime is 25888963957. The next prime is 25888964009. The reversal of 25888963993 is 39936988852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23966755344 + 1922208649 = 154812^2 + 43843^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25888963993 is a prime.

It is not a weakly prime, because it can be changed into another prime (25888963943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12944481996 + 12944481997.

It is an arithmetic number, because the mean of its divisors is an integer number (12944481997).

Almost surely, 2^25888963993 is an apocalyptic number.

It is an amenable number.

25888963993 is a deficient number, since it is larger than the sum of its proper divisors (1).

25888963993 is an equidigital number, since it uses as much as digits as its factorization.

25888963993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201553920, while the sum is 70.

The spelling of 25888963993 in words is "twenty-five billion, eight hundred eighty-eight million, nine hundred sixty-three thousand, nine hundred ninety-three".