1643136332 has 12 divisors (see below), whose sum is σ = 2877749280. Its totient is φ = 820922256.

The previous prime is 1643136329. The next prime is 1643136337. The reversal of 1643136332 is 2336313461.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1643136337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155732 + ... + 165947.

It is an arithmetic number, because the mean of its divisors is an integer number (239812440).

Almost surely, 2^1643136332 is an apocalyptic number.

It is an amenable number.

1643136332 is a deficient number, since it is larger than the sum of its proper divisors (1234612948).

1643136332 is a wasteful number, since it uses less digits than its factorization.

1643136332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322960 (or 322958 counting only the distinct ones).

The product of its digits is 23328, while the sum is 32.

The square root of 1643136332 is about 40535.6180660910. The cubic root of 1643136332 is about 1180.0249760107.

Adding to 1643136332 its reverse (2336313461), we get a palindrome (3979449793).

The spelling of 1643136332 in words is "one billion, six hundred forty-three million, one hundred thirty-six thousand, three hundred thirty-two".