8640851791 has 16 divisors (see below), whose sum is σ = 10155898368. Its totient is φ = 7247916000.

The previous prime is 8640851789. The next prime is 8640851797. The reversal of 8640851791 is 1971580468.

It is not a de Polignac number, because 8640851791 - 2¹ = 8640851789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8640851797) 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, 352950 + ... + 376636.

It is an arithmetic number, because the mean of its divisors is an integer number (634743648).

Almost surely, 2^8640851791 is an apocalyptic number.

8640851791 is a deficient number, since it is larger than the sum of its proper divisors (1515046577).

8640851791 is a wasteful number, since it uses less digits than its factorization.

8640851791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26262.

The product of its (nonzero) digits is 483840, while the sum is 49.

The square root of 8640851791 is about 92956.1821021066. The cubic root of 8640851791 is about 2052.0385663018.

The spelling of 8640851791 in words is "eight billion, six hundred forty million, eight hundred fifty-one thousand, seven hundred ninety-one".