252443781946 has 16 divisors (see below), whose sum is σ = 381644112744. Its totient is φ = 125231468544.

The previous prime is 252443781943. The next prime is 252443781977. The reversal of 252443781946 is 649187344252.

It can be written as a sum of positive squares in 4 ways, for example, as 216607398921 + 35836383025 = 465411^2 + 189305^2 .

It is not an unprimeable number, because it can be changed into a prime (252443781943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 385975 + ... + 808618.

Almost surely, 2^252443781946 is an apocalyptic number.

252443781946 is a deficient number, since it is larger than the sum of its proper divisors (129200330798).

252443781946 is a wasteful number, since it uses less digits than its factorization.

252443781946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195425.

The product of its digits is 11612160, while the sum is 55.

The spelling of 252443781946 in words is "two hundred fifty-two billion, four hundred forty-three million, seven hundred eighty-one thousand, nine hundred forty-six".