25478990219 has 2 divisors, whose sum is σ = 25478990220. Its totient is φ = 25478990218.

The previous prime is 25478990213. The next prime is 25478990249. The reversal of 25478990219 is 91209987452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25478990219 - 2¹⁶ = 25478924683 is a prime.

It is a super-2 number, since 2×25478990219² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25478990213) 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, 12739495109 + 12739495110.

It is an arithmetic number, because the mean of its divisors is an integer number (12739495110).

Almost surely, 2^25478990219 is an apocalyptic number.

25478990219 is a deficient number, since it is larger than the sum of its proper divisors (1).

25478990219 is an equidigital number, since it uses as much as digits as its factorization.

25478990219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3265920, while the sum is 56.

The spelling of 25478990219 in words is "twenty-five billion, four hundred seventy-eight million, nine hundred ninety thousand, two hundred nineteen".