705907648649 has 16 divisors (see below), whose sum is σ = 807627525120. Its totient is φ = 604407002640.

The previous prime is 705907648637. The next prime is 705907648669. The reversal of 705907648649 is 946846709507.

It is not a de Polignac number, because 705907648649 - 2²⁰ = 705906600073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (705907648609) 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, 55181444 + ... + 55194234.

It is an arithmetic number, because the mean of its divisors is an integer number (50476720320).

Almost surely, 2^705907648649 is an apocalyptic number.

It is an amenable number.

705907648649 is a deficient number, since it is larger than the sum of its proper divisors (101719876471).

705907648649 is a wasteful number, since it uses less digits than its factorization.

705907648649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20740.

The product of its (nonzero) digits is 91445760, while the sum is 65.

The spelling of 705907648649 in words is "seven hundred five billion, nine hundred seven million, six hundred forty-eight thousand, six hundred forty-nine".