8566057644 has 12 divisors (see below), whose sum is σ = 19987467864. Its totient is φ = 2855352544.

The previous prime is 8566057639. The next prime is 8566057651. The reversal of 8566057644 is 4467506658.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356919057 + ... + 356919080.

It is an arithmetic number, because the mean of its divisors is an integer number (1665622322).

Almost surely, 2^8566057644 is an apocalyptic number.

It is an amenable number.

8566057644 is an abundant number, since it is smaller than the sum of its proper divisors (11421410220).

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

8566057644 is a wasteful number, since it uses less digits than its factorization.

8566057644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713838144 (or 713838142 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 51.

The square root of 8566057644 is about 92552.9991086188. Note that the first 3 decimals coincide. The cubic root of 8566057644 is about 2046.1006697532.

The spelling of 8566057644 in words is "eight billion, five hundred sixty-six million, fifty-seven thousand, six hundred forty-four".