252998145989 has 2 divisors, whose sum is σ = 252998145990. Its totient is φ = 252998145988.

The previous prime is 252998145979. The next prime is 252998146013. The reversal of 252998145989 is 989541899252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 252471076225 + 527069764 = 502465^2 + 22958^2 .

It is a cyclic number.

It is not a de Polignac number, because 252998145989 - 2⁸ = 252998145733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252998145979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126499072994 + 126499072995.

It is an arithmetic number, because the mean of its divisors is an integer number (126499072995).

Almost surely, 2^252998145989 is an apocalyptic number.

It is an amenable number.

252998145989 is a deficient number, since it is larger than the sum of its proper divisors (1).

252998145989 is an equidigital number, since it uses as much as digits as its factorization.

252998145989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 167961600, while the sum is 71.

The spelling of 252998145989 in words is "two hundred fifty-two billion, nine hundred ninety-eight million, one hundred forty-five thousand, nine hundred eighty-nine".