805447070320 has 80 divisors (see below), whose sum is σ = 1954843007040. Its totient is φ = 308051453952.

The previous prime is 805447070287. The next prime is 805447070321. The reversal of 805447070320 is 23070744508.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805447070321) 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, 4731646 + ... + 4898914.

It is an arithmetic number, because the mean of its divisors is an integer number (24435537588).

Almost surely, 2^805447070320 is an apocalyptic number.

805447070320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 805447070320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (977421503520).

805447070320 is an abundant number, since it is smaller than the sum of its proper divisors (1149395936720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

805447070320 is a wasteful number, since it uses less digits than its factorization.

805447070320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169922 (or 169916 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 40.

The spelling of 805447070320 in words is "eight hundred five billion, four hundred forty-seven million, seventy thousand, three hundred twenty".