252533646809 has 2 divisors, whose sum is σ = 252533646810. Its totient is φ = 252533646808.

The previous prime is 252533646803. The next prime is 252533646821. The reversal of 252533646809 is 908646335252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148588662784 + 103944984025 = 385472^2 + 322405^2 .

It is a cyclic number.

It is not a de Polignac number, because 252533646809 - 2²⁰ = 252532598233 is a prime.

It is not a weakly prime, because it can be changed into another prime (252533646803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126266823404 + 126266823405.

It is an arithmetic number, because the mean of its divisors is an integer number (126266823405).

Almost surely, 2^252533646809 is an apocalyptic number.

It is an amenable number.

252533646809 is a deficient number, since it is larger than the sum of its proper divisors (1).

252533646809 is an equidigital number, since it uses as much as digits as its factorization.

252533646809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9331200, while the sum is 53.

The spelling of 252533646809 in words is "two hundred fifty-two billion, five hundred thirty-three million, six hundred forty-six thousand, eight hundred nine".