252267306818 has 18 divisors (see below), whose sum is σ = 385732874667. Its totient is φ = 123735305200.

The previous prime is 252267306799. The next prime is 252267306827. The reversal of 252267306818 is 818603762252.

It can be written as a sum of positive squares in 5 ways, for example, as 158709014689 + 93558292129 = 398383^2 + 305873^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=355153.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 37642868 + ... + 37649568.

Almost surely, 2^252267306818 is an apocalyptic number.

252267306818 is a deficient number, since it is larger than the sum of its proper divisors (133465567849).

252267306818 is an frugal number, since it uses more digits than its factorization.

252267306818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13510 (or 6756 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 50.

Multiplying 252267306818 by its sum of digits (50), we get a square (12613365340900 = 3551530²).

The spelling of 252267306818 in words is "two hundred fifty-two billion, two hundred sixty-seven million, three hundred six thousand, eight hundred eighteen".