26025172991 has 2 divisors, whose sum is σ = 26025172992. Its totient is φ = 26025172990.

The previous prime is 26025172937. The next prime is 26025173017. The reversal of 26025172991 is 19927152062.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26025172991 is a prime.

It is a super-2 number, since 2×26025172991² (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 (26025172391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13012586495 + 13012586496.

It is an arithmetic number, because the mean of its divisors is an integer number (13012586496).

Almost surely, 2^26025172991 is an apocalyptic number.

26025172991 is a deficient number, since it is larger than the sum of its proper divisors (1).

26025172991 is an equidigital number, since it uses as much as digits as its factorization.

26025172991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 44.

The spelling of 26025172991 in words is "twenty-six billion, twenty-five million, one hundred seventy-two thousand, nine hundred ninety-one".