806180991 has 32 divisors (see below), whose sum is σ = 1372847616. Its totient is φ = 408576000.

The previous prime is 806180983. The next prime is 806181007. The reversal of 806180991 is 199081608.

806180991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 806180991 - 2³ = 806180983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806180951) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33090 + ... + 52031.

It is an arithmetic number, because the mean of its divisors is an integer number (42901488).

Almost surely, 2^806180991 is an apocalyptic number.

806180991 is a deficient number, since it is larger than the sum of its proper divisors (566666625).

806180991 is a wasteful number, since it uses less digits than its factorization.

806180991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85183.

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 806180991 is about 28393.3265222658. The cubic root of 806180991 is about 930.7024372825.

The spelling of 806180991 in words is "eight hundred six million, one hundred eighty thousand, nine hundred ninety-one".