8640883994 has 12 divisors (see below), whose sum is σ = 12983882814. Its totient is φ = 4312928592.

The previous prime is 8640883967. The next prime is 8640884003. The reversal of 8640883994 is 4993880468.

It can be written as a sum of positive squares in 3 ways, for example, as 5710069225 + 2930814769 = 75565^2 + 54137^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3615752 + ... + 3618140.

Almost surely, 2^8640883994 is an apocalyptic number.

8640883994 is a deficient number, since it is larger than the sum of its proper divisors (4342998820).

8640883994 is an frugal number, since it uses more digits than its factorization.

8640883994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5537 (or 3148 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 59.

The square root of 8640883994 is about 92956.3553179663. The cubic root of 8640883994 is about 2052.0411154994.

The spelling of 8640883994 in words is "eight billion, six hundred forty million, eight hundred eighty-three thousand, nine hundred ninety-four".