25449016319 has 2 divisors, whose sum is σ = 25449016320. Its totient is φ = 25449016318.

The previous prime is 25449016297. The next prime is 25449016339. The reversal of 25449016319 is 91361094452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25449016319 - 2⁸ = 25449016063 is a prime.

It is a super-2 number, since 2×25449016319² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25449016319.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25449016339) 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, 12724508159 + 12724508160.

It is an arithmetic number, because the mean of its divisors is an integer number (12724508160).

Almost surely, 2^25449016319 is an apocalyptic number.

25449016319 is a deficient number, since it is larger than the sum of its proper divisors (1).

25449016319 is an equidigital number, since it uses as much as digits as its factorization.

25449016319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 25449016319 in words is "twenty-five billion, four hundred forty-nine million, sixteen thousand, three hundred nineteen".