25782209042 has 6 divisors (see below), whose sum is σ = 38673654183. Its totient is φ = 12890990982.

The previous prime is 25782209041. The next prime is 25782209107. The reversal of 25782209042 is 24090228752.

It can be written as a sum of positive squares in only one way, i.e., 12891104521 + 12891104521 = 113539^2 + 113539^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=113539.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25782209041) by changing a digit.

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 2 ways as a sum of consecutive naturals, for example, 170309 + ... + 283847.

Almost surely, 2^25782209042 is an apocalyptic number.

25782209042 is a deficient number, since it is larger than the sum of its proper divisors (12891445141).

25782209042 is an frugal number, since it uses more digits than its factorization.

25782209042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227080 (or 113541 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 25782209042 in words is "twenty-five billion, seven hundred eighty-two million, two hundred nine thousand, forty-two".