25545808042 has 8 divisors (see below), whose sum is σ = 38353773636. Its totient is φ = 12761216832.

The previous prime is 25545807997. The next prime is 25545808051. The reversal of 25545808042 is 24080854552.

It can be written as a sum of positive squares in 2 ways, for example, as 24661875681 + 883932361 = 157041^2 + 29731^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 25545808042.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5840863 + ... + 5845234.

Almost surely, 2^25545808042 is an apocalyptic number.

25545808042 is a deficient number, since it is larger than the sum of its proper divisors (12807965594).

25545808042 is a wasteful number, since it uses less digits than its factorization.

25545808042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11687192.

The product of its (nonzero) digits is 512000, while the sum is 43.

The spelling of 25545808042 in words is "twenty-five billion, five hundred forty-five million, eight hundred eight thousand, forty-two".