705678815009 has 16 divisors (see below), whose sum is σ = 819360457728. Its totient is φ = 595233148752.

The previous prime is 705678814987. The next prime is 705678815011. The reversal of 705678815009 is 900518876507.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-705678815009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (705678815089) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 304307 + ... + 1226360.

It is an arithmetic number, because the mean of its divisors is an integer number (51210028608).

Almost surely, 2^705678815009 is an apocalyptic number.

It is an amenable number.

705678815009 is a deficient number, since it is larger than the sum of its proper divisors (113681642719).

705678815009 is a wasteful number, since it uses less digits than its factorization.

705678815009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531724.

The product of its (nonzero) digits is 4233600, while the sum is 56.

The spelling of 705678815009 in words is "seven hundred five billion, six hundred seventy-eight million, eight hundred fifteen thousand, nine".