1643692804 has 48 divisors (see below), whose sum is σ = 3284765568. Its totient is φ = 712954368.

The previous prime is 1643692751. The next prime is 1643692823. The reversal of 1643692804 is 4082963461.

It is a happy 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 in 15 ways as a sum of consecutive naturals, for example, 1151139 + ... + 1152565.

It is an arithmetic number, because the mean of its divisors is an integer number (68432616).

Almost surely, 2^1643692804 is an apocalyptic number.

It is an amenable number.

1643692804 is a deficient number, since it is larger than the sum of its proper divisors (1641072764).

1643692804 is a wasteful number, since it uses less digits than its factorization.

1643692804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2764 (or 2762 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 1643692804 is about 40542.4814731412. The cubic root of 1643692804 is about 1180.1581718451.

The spelling of 1643692804 in words is "one billion, six hundred forty-three million, six hundred ninety-two thousand, eight hundred four".