25609867511 has 2 divisors, whose sum is σ = 25609867512. Its totient is φ = 25609867510.

The previous prime is 25609867457. The next prime is 25609867537. The reversal of 25609867511 is 11576890652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25609867511 - 2¹⁰ = 25609866487 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25609867511.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25609867111) 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, 12804933755 + 12804933756.

It is an arithmetic number, because the mean of its divisors is an integer number (12804933756).

Almost surely, 2^25609867511 is an apocalyptic number.

25609867511 is a deficient number, since it is larger than the sum of its proper divisors (1).

25609867511 is an equidigital number, since it uses as much as digits as its factorization.

25609867511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907200, while the sum is 50.

The spelling of 25609867511 in words is "twenty-five billion, six hundred nine million, eight hundred sixty-seven thousand, five hundred eleven".