25805058511 has 4 divisors (see below), whose sum is σ = 26434450224. Its totient is φ = 25175666800.

The previous prime is 25805058491. The next prime is 25805058527. The reversal of 25805058511 is 11585050852.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25805058511 - 2⁵ = 25805058479 is a prime.

It is a super-2 number, since 2×25805058511² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25805058571) 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 in 3 ways as a sum of consecutive naturals, for example, 314695795 + ... + 314695876.

It is an arithmetic number, because the mean of its divisors is an integer number (6608612556).

Almost surely, 2^25805058511 is an apocalyptic number.

25805058511 is a deficient number, since it is larger than the sum of its proper divisors (629391713).

25805058511 is an equidigital number, since it uses as much as digits as its factorization.

25805058511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629391712.

The product of its (nonzero) digits is 80000, while the sum is 40.

The spelling of 25805058511 in words is "twenty-five billion, eight hundred five million, fifty-eight thousand, five hundred eleven".