25646612655728 has 40 divisors (see below), whose sum is σ = 50207277370848. Its totient is φ = 12690067306752.

The previous prime is 25646612655691. The next prime is 25646612655733. The reversal of 25646612655728 is 82755621664652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2960675 + ... + 7749762.

Almost surely, 2^{25646612655728} is an apocalyptic number.

It is an amenable number.

25646612655728 is a deficient number, since it is larger than the sum of its proper divisors (24560664715120).

25646612655728 is a wasteful number, since it uses less digits than its factorization.

25646612655728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10712001 (or 10711995 counting only the distinct ones).

The product of its digits is 290304000, while the sum is 65.

The spelling of 25646612655728 in words is "twenty-five trillion, six hundred forty-six billion, six hundred twelve million, six hundred fifty-five thousand, seven hundred twenty-eight".