709847987128 has 64 divisors (see below), whose sum is σ = 1554134814720. Its totient is φ = 297666403200.

The previous prime is 709847987119. The next prime is 709847987129. The reversal of 709847987128 is 821789748907.

709847987128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (709847987129) 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, 108475 + ... + 1196437.

It is an arithmetic number, because the mean of its divisors is an integer number (24283356480).

Almost surely, 2^709847987128 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 709847987128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (777067407360).

709847987128 is an abundant number, since it is smaller than the sum of its proper divisors (844286827592).

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

709847987128 is a wasteful number, since it uses less digits than its factorization.

709847987128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088228 (or 1088224 counting only the distinct ones).

The product of its (nonzero) digits is 113799168, while the sum is 70.

The spelling of 709847987128 in words is "seven hundred nine billion, eight hundred forty-seven million, nine hundred eighty-seven thousand, one hundred twenty-eight".