25638583611256 has 64 divisors (see below), whose sum is σ = 60011887150080. Its totient is φ = 9976135908480.

The previous prime is 25638583611241. The next prime is 25638583611257. The reversal of 25638583611256 is 65211638583652.

It is a junction number, because it is equal to n+sod(n) for n = 25638583611194 and 25638583611203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25638583611257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26445616 + ... + 27397951.

It is an arithmetic number, because the mean of its divisors is an integer number (937685736720).

Almost surely, 2^{25638583611256} is an apocalyptic number.

It is an amenable number.

25638583611256 is an abundant number, since it is smaller than the sum of its proper divisors (34373303538824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25638583611256 is a wasteful number, since it uses less digits than its factorization.

25638583611256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53844364 (or 53844360 counting only the distinct ones).

The product of its digits is 62208000, while the sum is 61.

The spelling of 25638583611256 in words is "twenty-five trillion, six hundred thirty-eight billion, five hundred eighty-three million, six hundred eleven thousand, two hundred fifty-six".