25567815211 has 2 divisors, whose sum is σ = 25567815212. Its totient is φ = 25567815210.

The previous prime is 25567815181. The next prime is 25567815233. The reversal of 25567815211 is 11251876552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25567815211 - 2¹³ = 25567807019 is a prime.

It is not a weakly prime, because it can be changed into another prime (25567845211) by changing a digit.

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 as a sum of consecutive naturals, namely, 12783907605 + 12783907606.

It is an arithmetic number, because the mean of its divisors is an integer number (12783907606).

Almost surely, 2^25567815211 is an apocalyptic number.

25567815211 is a deficient number, since it is larger than the sum of its proper divisors (1).

25567815211 is an equidigital number, since it uses as much as digits as its factorization.

25567815211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 168000, while the sum is 43.

The spelling of 25567815211 in words is "twenty-five billion, five hundred sixty-seven million, eight hundred fifteen thousand, two hundred eleven".