800344066545 has 20 divisors (see below), whose sum is σ = 1434690845940. Its totient is φ = 426850168608.

The previous prime is 800344066493. The next prime is 800344066547. The reversal of 800344066545 is 545660443008.

800344066545 is a `hidden beast` number, since 8 + 0 + 0 + 3 + 4 + 40 + 66 + 545 = 666.

800344066545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 534963513744 + 265380552801 = 731412^2 + 515151^2 .

It is not a de Polignac number, because 800344066545 - 2⁸ = 800344066289 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 800344066545.

It is not an unprimeable number, because it can be changed into a prime (800344066547) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 988078690 + ... + 988079499.

It is an arithmetic number, because the mean of its divisors is an integer number (71734542297).

Almost surely, 2^800344066545 is an apocalyptic number.

It is an amenable number.

800344066545 is a deficient number, since it is larger than the sum of its proper divisors (634346779395).

800344066545 is a wasteful number, since it uses less digits than its factorization.

800344066545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1976158206 (or 1976158197 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 45.

The spelling of 800344066545 in words is "eight hundred billion, three hundred forty-four million, sixty-six thousand, five hundred forty-five".