1643348116 has 6 divisors (see below), whose sum is σ = 2875859210. Its totient is φ = 821674056.

The previous prime is 1643348089. The next prime is 1643348131. The reversal of 1643348116 is 6118433461.

It can be written as a sum of positive squares in only one way, i.e., 1317690000 + 325658116 = 36300^2 + 18046^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 205418511 + ... + 205418518.

Almost surely, 2^1643348116 is an apocalyptic number.

It is an amenable number.

1643348116 is a deficient number, since it is larger than the sum of its proper divisors (1232511094).

1643348116 is a wasteful number, since it uses less digits than its factorization.

1643348116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410837033 (or 410837031 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 1643348116 is about 40538.2303017781. The cubic root of 1643348116 is about 1180.0756716769.

The spelling of 1643348116 in words is "one billion, six hundred forty-three million, three hundred forty-eight thousand, one hundred sixteen".