1638182852 has 6 divisors (see below), whose sum is σ = 2866819998. Its totient is φ = 819091424.

The previous prime is 1638182813. The next prime is 1638182899. The reversal of 1638182852 is 2582818361.

It can be written as a sum of positive squares in only one way, i.e., 1436713216 + 201469636 = 37904^2 + 14194^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204772853 + ... + 204772860.

It is an arithmetic number, because the mean of its divisors is an integer number (477803333).

Almost surely, 2^1638182852 is an apocalyptic number.

It is an amenable number.

1638182852 is a deficient number, since it is larger than the sum of its proper divisors (1228637146).

1638182852 is a wasteful number, since it uses less digits than its factorization.

1638182852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409545717 (or 409545715 counting only the distinct ones).

The product of its digits is 184320, while the sum is 44.

The square root of 1638182852 is about 40474.4716086572. The cubic root of 1638182852 is about 1178.8379952279.

The spelling of 1638182852 in words is "one billion, six hundred thirty-eight million, one hundred eighty-two thousand, eight hundred fifty-two".