804372945991 has 4 divisors (see below), whose sum is σ = 804376076184. Its totient is φ = 804369815800.

The previous prime is 804372945977. The next prime is 804372946007. The reversal of 804372945991 is 199549273408.

804372945991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 804372945991 - 2³³ = 795783011399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (804372945391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1141405 + ... + 1706326.

It is an arithmetic number, because the mean of its divisors is an integer number (201094019046).

Almost surely, 2^804372945991 is an apocalyptic number.

804372945991 is a deficient number, since it is larger than the sum of its proper divisors (3130193).

804372945991 is a wasteful number, since it uses less digits than its factorization.

804372945991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3130192.

The product of its (nonzero) digits is 19595520, while the sum is 61.

The spelling of 804372945991 in words is "eight hundred four billion, three hundred seventy-two million, nine hundred forty-five thousand, nine hundred ninety-one".