26525555591 has 2 divisors, whose sum is σ = 26525555592. Its totient is φ = 26525555590.

The previous prime is 26525555521. The next prime is 26525555627. The reversal of 26525555591 is 19555552562.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26525555591 - 2¹⁰ = 26525554567 is a prime.

It is a super-2 number, since 2×26525555591² (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 (26525555501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13262777795 + 13262777796.

It is an arithmetic number, because the mean of its divisors is an integer number (13262777796).

Almost surely, 2^26525555591 is an apocalyptic number.

26525555591 is a deficient number, since it is larger than the sum of its proper divisors (1).

26525555591 is an equidigital number, since it uses as much as digits as its factorization.

26525555591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3375000, while the sum is 50.

The spelling of 26525555591 in words is "twenty-six billion, five hundred twenty-five million, five hundred fifty-five thousand, five hundred ninety-one".