808891451805 has 16 divisors (see below), whose sum is σ = 1294713120960. Its totient is φ = 431246508288.

The previous prime is 808891451803. The next prime is 808891451831. The reversal of 808891451805 is 508154198808.

It is not a de Polignac number, because 808891451805 - 2¹ = 808891451803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (808891451801) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 10100412 + ... + 10180181.

It is an arithmetic number, because the mean of its divisors is an integer number (80919570060).

Almost surely, 2^808891451805 is an apocalyptic number.

It is an amenable number.

808891451805 is a deficient number, since it is larger than the sum of its proper divisors (485821669155).

808891451805 is a wasteful number, since it uses less digits than its factorization.

808891451805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20283260.

The product of its (nonzero) digits is 3686400, while the sum is 57.

The spelling of 808891451805 in words is "eight hundred eight billion, eight hundred ninety-one million, four hundred fifty-one thousand, eight hundred five".