8191733643 has 6 divisors (see below), whose sum is σ = 11832504164. Its totient is φ = 5461155756.

The previous prime is 8191733633. The next prime is 8191733647. The reversal of 8191733643 is 3463371918.

It is not a de Polignac number, because 8191733643 - 2¹² = 8191729547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8191733647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 455096305 + ... + 455096322.

Almost surely, 2^8191733643 is an apocalyptic number.

8191733643 is a deficient number, since it is larger than the sum of its proper divisors (3640770521).

8191733643 is a wasteful number, since it uses less digits than its factorization.

8191733643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910192633 (or 910192630 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 8191733643 is about 90508.1965514726. The cubic root of 8191733643 is about 2015.8518313664.

The spelling of 8191733643 in words is "eight billion, one hundred ninety-one million, seven hundred thirty-three thousand, six hundred forty-three".