805193307136 has 22 divisors (see below), whose sum is σ = 1609600294730. Its totient is φ = 402596653056.

The previous prime is 805193307133. The next prime is 805193307161. The reversal of 805193307136 is 631703391508.

It can be written as a sum of positive squares in only one way, i.e., 715959668736 + 89233638400 = 846144^2 + 298720^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805193307131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 393159771 + ... + 393161818.

Almost surely, 2^805193307136 is an apocalyptic number.

It is an amenable number.

805193307136 is a deficient number, since it is larger than the sum of its proper divisors (804406987594).

805193307136 is an equidigital number, since it uses as much as digits as its factorization.

805193307136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786321609 (or 786321591 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 46.

The spelling of 805193307136 in words is "eight hundred five billion, one hundred ninety-three million, three hundred seven thousand, one hundred thirty-six".