191583040804 has 27 divisors (see below), whose sum is σ = 339217679857. Its totient is φ = 94676693408.

The previous prime is 191583040799. The next prime is 191583040811. The reversal of 191583040804 is 408040385191.

The square root of 191583040804 is 437702.

It is a perfect power (a square), and thus also a powerful number.

191583040804 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 36788007204 + 154795033600 = 191802^2 + 393440^2 .

It is a Duffinian number.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 77909727 + ... + 77912185.

Almost surely, 2^191583040804 is an apocalyptic number.

191583040804 is the 437702-nd square number.

It is an amenable number.

191583040804 is a deficient number, since it is larger than the sum of its proper divisors (147634639053).

191583040804 is an frugal number, since it uses more digits than its factorization.

191583040804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5100 (or 2550 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 191583040804 in words is "one hundred ninety-one billion, five hundred eighty-three million, forty thousand, eight hundred four".