707985479920 has 80 divisors (see below), whose sum is σ = 1733586855840. Its totient is φ = 268152118272.

The previous prime is 707985479909. The next prime is 707985479921. The reversal of 707985479920 is 29974589707.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (707985479921) 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, 2880922 + ... + 3116998.

It is an arithmetic number, because the mean of its divisors is an integer number (21669835698).

Almost surely, 2^707985479920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 707985479920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (866793427920).

707985479920 is an abundant number, since it is smaller than the sum of its proper divisors (1025601375920).

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

707985479920 is a wasteful number, since it uses less digits than its factorization.

707985479920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238082 (or 238076 counting only the distinct ones).

The product of its (nonzero) digits is 80015040, while the sum is 67.

The spelling of 707985479920 in words is "seven hundred seven billion, nine hundred eighty-five million, four hundred seventy-nine thousand, nine hundred twenty".