8791709640 has 128 divisors (see below), whose sum is σ = 31729536000. Its totient is φ = 1903765248.

The previous prime is 8791709639. The next prime is 8791709651. The reversal of 8791709640 is 469071978.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 259470 + ... + 291389.

It is an arithmetic number, because the mean of its divisors is an integer number (247887000).

Almost surely, 2^8791709640 is an apocalyptic number.

It is an amenable number.

8791709640 is an abundant number, since it is smaller than the sum of its proper divisors (22937826360).

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

8791709640 is a wasteful number, since it uses less digits than its factorization.

8791709640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550899 (or 550895 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 51.

The square root of 8791709640 is about 93764.1170171191. The cubic root of 8791709640 is about 2063.9116958646.

The spelling of 8791709640 in words is "eight billion, seven hundred ninety-one million, seven hundred nine thousand, six hundred forty".