25286839813 has 2 divisors, whose sum is σ = 25286839814. Its totient is φ = 25286839812.

The previous prime is 25286839793. The next prime is 25286839847. The reversal of 25286839813 is 31893868252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24662189764 + 624650049 = 157042^2 + 24993^2 .

It is a cyclic number.

It is not a de Polignac number, because 25286839813 - 2²¹ = 25284742661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25286839213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12643419906 + 12643419907.

It is an arithmetic number, because the mean of its divisors is an integer number (12643419907).

Almost surely, 2^25286839813 is an apocalyptic number.

It is an amenable number.

25286839813 is a deficient number, since it is larger than the sum of its proper divisors (1).

25286839813 is an equidigital number, since it uses as much as digits as its factorization.

25286839813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4976640, while the sum is 55.

It can be divided in two parts, 252868 and 39813, that added together give a square (292681 = 541²).

The spelling of 25286839813 in words is "twenty-five billion, two hundred eighty-six million, eight hundred thirty-nine thousand, eight hundred thirteen".