705375721605 has 64 divisors (see below), whose sum is σ = 1224595791360. Its totient is φ = 345634308096.

The previous prime is 705375721579. The next prime is 705375721643. The reversal of 705375721605 is 506127573507.

It is not a de Polignac number, because 705375721605 - 2⁹ = 705375721093 is a prime.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 1748317 + ... + 2113613.

It is an arithmetic number, because the mean of its divisors is an integer number (19134309240).

Almost surely, 2^705375721605 is an apocalyptic number.

It is an amenable number.

705375721605 is a deficient number, since it is larger than the sum of its proper divisors (519220069755).

705375721605 is a wasteful number, since it uses less digits than its factorization.

705375721605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365550.

The product of its (nonzero) digits is 1543500, while the sum is 48.

The spelling of 705375721605 in words is "seven hundred five billion, three hundred seventy-five million, seven hundred twenty-one thousand, six hundred five".