25582604387 has 2 divisors, whose sum is σ = 25582604388. Its totient is φ = 25582604386.

The previous prime is 25582604347. The next prime is 25582604389. The reversal of 25582604387 is 78340628552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25582604387 - 2¹² = 25582600291 is a prime.

Together with 25582604389, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25582604389) 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 as a sum of consecutive naturals, namely, 12791302193 + 12791302194.

It is an arithmetic number, because the mean of its divisors is an integer number (12791302194).

Almost surely, 2^25582604387 is an apocalyptic number.

25582604387 is a deficient number, since it is larger than the sum of its proper divisors (1).

25582604387 is an equidigital number, since it uses as much as digits as its factorization.

25582604387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3225600, while the sum is 50.

The spelling of 25582604387 in words is "twenty-five billion, five hundred eighty-two million, six hundred four thousand, three hundred eighty-seven".