706720781328 has 20 divisors (see below), whose sum is σ = 1825695351888. Its totient is φ = 235573593760.

The previous prime is 706720781317. The next prime is 706720781341. The reversal of 706720781328 is 823187027607.

It is a happy number.

It is an unprimeable number.

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, 7361674758 + ... + 7361674853.

Almost surely, 2^706720781328 is an apocalyptic number.

It is an amenable number.

706720781328 is an abundant number, since it is smaller than the sum of its proper divisors (1118974570560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

706720781328 is a wasteful number, since it uses less digits than its factorization.

706720781328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14723349622 (or 14723349616 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 51.

The spelling of 706720781328 in words is "seven hundred six billion, seven hundred twenty million, seven hundred eighty-one thousand, three hundred twenty-eight".