1643336612 has 12 divisors (see below), whose sum is σ = 2876393436. Its totient is φ = 821509920.

The previous prime is 1643336593. The next prime is 1643336641. The reversal of 1643336612 is 2166333461.

It can be written as a sum of positive squares in 2 ways, for example, as 704159296 + 939177316 = 26536^2 + 30646^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14483 + ... + 59130.

It is an arithmetic number, because the mean of its divisors is an integer number (239699453).

Almost surely, 2^1643336612 is an apocalyptic number.

It is an amenable number.

1643336612 is a deficient number, since it is larger than the sum of its proper divisors (1233056824).

1643336612 is a wasteful number, since it uses less digits than its factorization.

1643336612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79198 (or 79196 counting only the distinct ones).

The product of its digits is 46656, while the sum is 35.

The square root of 1643336612 is about 40538.0884107773. The cubic root of 1643336612 is about 1180.0729180258.

The spelling of 1643336612 in words is "one billion, six hundred forty-three million, three hundred thirty-six thousand, six hundred twelve".