25927394189 has 4 divisors (see below), whose sum is σ = 26352433500. Its totient is φ = 25502354880.

The previous prime is 25927394153. The next prime is 25927394191. The reversal of 25927394189 is 98149372952.

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 6869591689 + 19057802500 = 82883^2 + 138050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25927394189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25927394089) 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, 212519564 + ... + 212519685.

It is an arithmetic number, because the mean of its divisors is an integer number (6588108375).

Almost surely, 2^25927394189 is an apocalyptic number.

It is an amenable number.

25927394189 is a deficient number, since it is larger than the sum of its proper divisors (425039311).

25927394189 is an equidigital number, since it uses as much as digits as its factorization.

25927394189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425039310.

The product of its digits is 9797760, while the sum is 59.

The spelling of 25927394189 in words is "twenty-five billion, nine hundred twenty-seven million, three hundred ninety-four thousand, one hundred eighty-nine".