7864500008 has 8 divisors (see below), whose sum is σ = 14745937530. Its totient is φ = 3932250000.

The previous prime is 7864500001. The next prime is 7864500011. The reversal of 7864500008 is 8000054687.

It can be written as a sum of positive squares in only one way, i.e., 4730963524 + 3133536484 = 68782^2 + 55978^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (7864500001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 491531243 + ... + 491531258.

Almost surely, 2^7864500008 is an apocalyptic number.

It is an amenable number.

7864500008 is a deficient number, since it is larger than the sum of its proper divisors (6881437522).

7864500008 is a wasteful number, since it uses less digits than its factorization.

7864500008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983062507 (or 983062503 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 7864500008 is about 88682.0162603445. The cubic root of 7864500008 is about 1988.6439764027.

The spelling of 7864500008 in words is "seven billion, eight hundred sixty-four million, five hundred thousand, eight".