25478554708 has 12 divisors (see below), whose sum is σ = 46124969940. Its totient is φ = 12299991872.

The previous prime is 25478554669. The next prime is 25478554757. The reversal of 25478554708 is 80745587452.

It can be written as a sum of positive squares in 2 ways, for example, as 12937242564 + 12541312144 = 113742^2 + 111988^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109821241 + ... + 109821472.

It is an arithmetic number, because the mean of its divisors is an integer number (3843747495).

Almost surely, 2^25478554708 is an apocalyptic number.

It is an amenable number.

25478554708 is a deficient number, since it is larger than the sum of its proper divisors (20646415232).

25478554708 is a wasteful number, since it uses less digits than its factorization.

25478554708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219642746 (or 219642744 counting only the distinct ones).

The product of its (nonzero) digits is 12544000, while the sum is 55.

The spelling of 25478554708 in words is "twenty-five billion, four hundred seventy-eight million, five hundred fifty-four thousand, seven hundred eight".