25570843026561 has 40 divisors (see below), whose sum is σ = 43656586970304. Its totient is φ = 14611491905760.

The previous prime is 25570843026559. The next prime is 25570843026607. The reversal of 25570843026561 is 16562034807552.

25570843026561 is a `hidden beast` number, since 2 + 5 + 5 + 70 + 8 + 4 + 3 + 0 + 2 + 6 + 561 = 666.

It is not a de Polignac number, because 25570843026561 - 2¹ = 25570843026559 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25570843026498 and 25570843026507.

It is not an unprimeable number, because it can be changed into a prime (25570843026541) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 19740631 + ... + 20996051.

Almost surely, 2^{25570843026561} is an apocalyptic number.

25570843026561 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25570843026561 is a deficient number, since it is larger than the sum of its proper divisors (18085743943743).

25570843026561 is a wasteful number, since it uses less digits than its factorization.

25570843026561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291363 (or 1291354 counting only the distinct ones).

The product of its (nonzero) digits is 12096000, while the sum is 54.

The spelling of 25570843026561 in words is "twenty-five trillion, five hundred seventy billion, eight hundred forty-three million, twenty-six thousand, five hundred sixty-one".