8197520564 has 48 divisors (see below), whose sum is σ = 15410642688. Its totient is φ = 3801735168.

The previous prime is 8197520561. The next prime is 8197520579. The reversal of 8197520564 is 4650257918.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8197520561) 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 in 15 ways as a sum of consecutive naturals, for example, 2611604 + ... + 2614740.

It is an arithmetic number, because the mean of its divisors is an integer number (321055056).

Almost surely, 2^8197520564 is an apocalyptic number.

It is an amenable number.

8197520564 is a deficient number, since it is larger than the sum of its proper divisors (7213122124).

8197520564 is a wasteful number, since it uses less digits than its factorization.

8197520564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3704 (or 3702 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 47.

The square root of 8197520564 is about 90540.1599512614. The cubic root of 8197520564 is about 2016.3264085396.

The spelling of 8197520564 in words is "eight billion, one hundred ninety-seven million, five hundred twenty thousand, five hundred sixty-four".