25773126722 has 18 divisors (see below), whose sum is σ = 44974249497. Its totient is φ = 11044944624.

The previous prime is 25773126649. The next prime is 25773126749. The reversal of 25773126722 is 22762137752.

It can be written as a sum of positive squares in 2 ways, for example, as 23131063921 + 2642062801 = 152089^2 + 51401^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=113519.

It is a super-2 number, since 2×25773126722² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 1581158 + ... + 1597374.

Almost surely, 2^25773126722 is an apocalyptic number.

25773126722 is a deficient number, since it is larger than the sum of its proper divisors (19201122775).

25773126722 is an frugal number, since it uses more digits than its factorization.

25773126722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32450 (or 16226 counting only the distinct ones).

The product of its digits is 493920, while the sum is 44.

The spelling of 25773126722 in words is "twenty-five billion, seven hundred seventy-three million, one hundred twenty-six thousand, seven hundred twenty-two".