26691879025 has 18 divisors (see below), whose sum is σ = 38501675430. Its totient is φ = 18303001920.

The previous prime is 26691879013. The next prime is 26691879031. The reversal of 26691879025 is 52097819662.

It can be written as a sum of positive squares in 3 ways, for example, as 6137782336 + 20554096689 = 78344^2 + 143367^2 .

It is not a de Polignac number, because 26691879025 - 2⁹ = 26691878513 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10893420 + ... + 10895869.

Almost surely, 2^26691879025 is an apocalyptic number.

26691879025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

26691879025 is a deficient number, since it is larger than the sum of its proper divisors (11809796405).

26691879025 is a wasteful number, since it uses less digits than its factorization.

26691879025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21789313 (or 21789301 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 26691879025 in words is "twenty-six billion, six hundred ninety-one million, eight hundred seventy-nine thousand, twenty-five".