800643381075 has 72 divisors (see below), whose sum is σ = 1534050908208. Its totient is φ = 397748183040.

The previous prime is 800643381067. The next prime is 800643381091. The reversal of 800643381075 is 570183346008.

800643381075 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 800643381075 - 2³ = 800643381067 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 800643381075.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 707937 + ... + 1449986.

It is an arithmetic number, because the mean of its divisors is an integer number (21306262614).

Almost surely, 2^800643381075 is an apocalyptic number.

800643381075 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

800643381075 is a deficient number, since it is larger than the sum of its proper divisors (733407527133).

800643381075 is a wasteful number, since it uses less digits than its factorization.

800643381075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158053 (or 2158045 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 800643381075 in words is "eight hundred billion, six hundred forty-three million, three hundred eighty-one thousand, seventy-five".