6565091564 has 12 divisors (see below), whose sum is σ = 11756094504. Its totient is φ = 3206207424.

The previous prime is 6565091513. The next prime is 6565091591. The reversal of 6565091564 is 4651905656.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

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, 19084397 + ... + 19084740.

It is an arithmetic number, because the mean of its divisors is an integer number (979674542).

Almost surely, 2^6565091564 is an apocalyptic number.

It is an amenable number.

6565091564 is a deficient number, since it is larger than the sum of its proper divisors (5191002940).

6565091564 is a wasteful number, since it uses less digits than its factorization.

6565091564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38169184 (or 38169182 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 47.

The square root of 6565091564 is about 81025.2526315099. The cubic root of 6565091564 is about 1872.4645137936.

The spelling of 6565091564 in words is "six billion, five hundred sixty-five million, ninety-one thousand, five hundred sixty-four".