25670055571 has 2 divisors, whose sum is σ = 25670055572. Its totient is φ = 25670055570.

The previous prime is 25670055557. The next prime is 25670055577. The reversal of 25670055571 is 17555007652.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25670055571 - 2¹¹ = 25670053523 is a prime.

It is a super-4 number, since 4×25670055571⁴ (a number of 43 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (25670055577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12835027785 + 12835027786.

It is an arithmetic number, because the mean of its divisors is an integer number (12835027786).

Almost surely, 2^25670055571 is an apocalyptic number.

25670055571 is a deficient number, since it is larger than the sum of its proper divisors (1).

25670055571 is an equidigital number, since it uses as much as digits as its factorization.

25670055571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 367500, while the sum is 43.

The spelling of 25670055571 in words is "twenty-five billion, six hundred seventy million, fifty-five thousand, five hundred seventy-one".