705438720005 has 4 divisors (see below), whose sum is σ = 846526464012. Its totient is φ = 564350976000.

The previous prime is 705438720001. The next prime is 705438720011. The reversal of 705438720005 is 500027834507.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500027834507 = 757 ⋅660538751.

It can be written as a sum of positive squares in 2 ways, for example, as 88093801636 + 617344918369 = 296806^2 + 785713^2 .

It is not a de Polignac number, because 705438720005 - 2² = 705438720001 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705438720001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70543871996 + ... + 70543872005.

It is an arithmetic number, because the mean of its divisors is an integer number (211631616003).

Almost surely, 2^705438720005 is an apocalyptic number.

It is an amenable number.

705438720005 is a deficient number, since it is larger than the sum of its proper divisors (141087744007).

705438720005 is a wasteful number, since it uses less digits than its factorization.

705438720005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141087744006.

The product of its (nonzero) digits is 235200, while the sum is 41.

The spelling of 705438720005 in words is "seven hundred five billion, four hundred thirty-eight million, seven hundred twenty thousand, five".