25870958689 has 4 divisors (see below), whose sum is σ = 25873965460. Its totient is φ = 25867951920.

The previous prime is 25870958677. The next prime is 25870958699. The reversal of 25870958689 is 98685907852.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11687339664 + 14183619025 = 108108^2 + 119095^2 .

It is a cyclic number.

It is not a de Polignac number, because 25870958689 - 2¹⁵ = 25870925921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25870958699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1490442 + ... + 1507699.

It is an arithmetic number, because the mean of its divisors is an integer number (6468491365).

Almost surely, 2^25870958689 is an apocalyptic number.

It is an amenable number.

25870958689 is a deficient number, since it is larger than the sum of its proper divisors (3006771).

25870958689 is an equidigital number, since it uses as much as digits as its factorization.

25870958689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3006770.

The product of its (nonzero) digits is 87091200, while the sum is 67.

The spelling of 25870958689 in words is "twenty-five billion, eight hundred seventy million, nine hundred fifty-eight thousand, six hundred eighty-nine".