25956891441919 has 4 divisors (see below), whose sum is σ = 25956969552144. Its totient is φ = 25956813331696.

The previous prime is 25956891441911. The next prime is 25956891441947. The reversal of 25956891441919 is 91914419865952.

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 25956891441919 - 2³ = 25956891441911 is a prime.

It is a super-2 number, since 2×25956891441919² (a number of 28 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 (25956891441911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38554507 + ... + 39221980.

It is an arithmetic number, because the mean of its divisors is an integer number (6489242388036).

Almost surely, 2^{25956891441919} is an apocalyptic number.

25956891441919 is a deficient number, since it is larger than the sum of its proper divisors (78110225).

25956891441919 is an equidigital number, since it uses as much as digits as its factorization.

25956891441919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78110224.

The product of its digits is 251942400, while the sum is 73.

The spelling of 25956891441919 in words is "twenty-five trillion, nine hundred fifty-six billion, eight hundred ninety-one million, four hundred forty-one thousand, nine hundred nineteen".