25862826991 has 2 divisors, whose sum is σ = 25862826992. Its totient is φ = 25862826990.

The previous prime is 25862826967. The next prime is 25862827049. The reversal of 25862826991 is 19962826852.

It is an a-pointer prime, because the next prime (25862827049) can be obtained adding 25862826991 to its sum of digits (58).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25862826991 - 2⁵ = 25862826959 is a prime.

It is a super-2 number, since 2×25862826991² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25862826091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12931413495 + 12931413496.

It is an arithmetic number, because the mean of its divisors is an integer number (12931413496).

Almost surely, 2^25862826991 is an apocalyptic number.

25862826991 is a deficient number, since it is larger than the sum of its proper divisors (1).

25862826991 is an equidigital number, since it uses as much as digits as its factorization.

25862826991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7464960, while the sum is 58.

The spelling of 25862826991 in words is "twenty-five billion, eight hundred sixty-two million, eight hundred twenty-six thousand, nine hundred ninety-one".