252638842493 has 2 divisors, whose sum is σ = 252638842494. Its totient is φ = 252638842492.

The previous prime is 252638842447. The next prime is 252638842499. The reversal of 252638842493 is 394248836252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207059581444 + 45579261049 = 455038^2 + 213493^2 .

It is a cyclic number.

It is not a de Polignac number, because 252638842493 - 2⁶ = 252638842429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252638842499) 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, 126319421246 + 126319421247.

It is an arithmetic number, because the mean of its divisors is an integer number (126319421247).

Almost surely, 2^252638842493 is an apocalyptic number.

It is an amenable number.

252638842493 is a deficient number, since it is larger than the sum of its proper divisors (1).

252638842493 is an equidigital number, since it uses as much as digits as its factorization.

252638842493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19906560, while the sum is 56.

The spelling of 252638842493 in words is "two hundred fifty-two billion, six hundred thirty-eight million, eight hundred forty-two thousand, four hundred ninety-three".