7820043805723 has 16 divisors (see below), whose sum is σ = 7888841009280. Its totient is φ = 7751529553536.

The previous prime is 7820043805669. The next prime is 7820043805759. The reversal of 7820043805723 is 3275083400287.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 7820043805723 - 2²¹ = 7820041708571 is a prime.

It is a super-2 number, since 2×7820043805723² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7820043815723) 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, 263917273 + ... + 263946901.

It is an arithmetic number, because the mean of its divisors is an integer number (493052563080).

Almost surely, 2^{7820043805723} is an apocalyptic number.

7820043805723 is a deficient number, since it is larger than the sum of its proper divisors (68797203557).

7820043805723 is a wasteful number, since it uses less digits than its factorization.

7820043805723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34326.

The product of its (nonzero) digits is 2257920, while the sum is 49.

The spelling of 7820043805723 in words is "seven trillion, eight hundred twenty billion, forty-three million, eight hundred five thousand, seven hundred twenty-three".