8661864568 has 16 divisors (see below), whose sum is σ = 18561138480. Its totient is φ = 3712227648.

The previous prime is 8661864559. The next prime is 8661864583. The reversal of 8661864568 is 8654681668.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77338021 + ... + 77338132.

It is an arithmetic number, because the mean of its divisors is an integer number (1160071155).

Almost surely, 2^8661864568 is an apocalyptic number.

It is an amenable number.

8661864568 is an abundant number, since it is smaller than the sum of its proper divisors (9899273912).

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

8661864568 is a wasteful number, since it uses less digits than its factorization.

8661864568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154676166 (or 154676162 counting only the distinct ones).

The product of its digits is 13271040, while the sum is 58.

The square root of 8661864568 is about 93069.1386443433. The cubic root of 8661864568 is about 2053.7005985785.

The spelling of 8661864568 in words is "eight billion, six hundred sixty-one million, eight hundred sixty-four thousand, five hundred sixty-eight".