25255388780389 has 2 divisors, whose sum is σ = 25255388780390. Its totient is φ = 25255388780388.

The previous prime is 25255388780353. The next prime is 25255388780441. The reversal of 25255388780389 is 98308788355252.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25236386157889 + 19002622500 = 5023583^2 + 137850^2 .

It is a cyclic number.

It is not a de Polignac number, because 25255388780389 - 2⁷ = 25255388780261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25255388780309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12627694390194 + 12627694390195.

It is an arithmetic number, because the mean of its divisors is an integer number (12627694390195).

Almost surely, 2^{25255388780389} is an apocalyptic number.

It is an amenable number.

25255388780389 is a deficient number, since it is larger than the sum of its proper divisors (1).

25255388780389 is an equidigital number, since it uses as much as digits as its factorization.

25255388780389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1161216000, while the sum is 73.

The spelling of 25255388780389 in words is "twenty-five trillion, two hundred fifty-five billion, three hundred eighty-eight million, seven hundred eighty thousand, three hundred eighty-nine".