806513974991 has 16 divisors (see below), whose sum is σ = 812254008384. Its totient is φ = 800798928384.

The previous prime is 806513974933. The next prime is 806513974997. The reversal of 806513974991 is 199479315608.

It is a cyclic number.

It is not a de Polignac number, because 806513974991 - 2⁶ = 806513974927 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 (806513974997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130648781 + ... + 130654953.

It is an arithmetic number, because the mean of its divisors is an integer number (50765875524).

Almost surely, 2^806513974991 is an apocalyptic number.

806513974991 is a deficient number, since it is larger than the sum of its proper divisors (5740033393).

806513974991 is a wasteful number, since it uses less digits than its factorization.

806513974991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8050.

The product of its (nonzero) digits is 14696640, while the sum is 62.

The spelling of 806513974991 in words is "eight hundred six billion, five hundred thirteen million, nine hundred seventy-four thousand, nine hundred ninety-one".