25778575922 has 18 divisors (see below), whose sum is σ = 42506811837. Its totient is φ = 11716399200.

The previous prime is 25778575909. The next prime is 25778575967. The reversal of 25778575922 is 22957587752.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25682947081 + 95628841 = 160259^2 + 9779^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=113531.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2492522 + ... + 2502842.

Almost surely, 2^25778575922 is an apocalyptic number.

25778575922 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25778575922 is a deficient number, since it is larger than the sum of its proper divisors (16728235915).

25778575922 is an frugal number, since it uses more digits than its factorization.

25778575922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20666 (or 10334 counting only the distinct ones).

The product of its digits is 24696000, while the sum is 59.

The spelling of 25778575922 in words is "twenty-five billion, seven hundred seventy-eight million, five hundred seventy-five thousand, nine hundred twenty-two".