9189876564 has 72 divisors (see below), whose sum is σ = 25423087872. Its totient is φ = 2775876480.

The previous prime is 9189876539. The next prime is 9189876581. The reversal of 9189876564 is 4656789819.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86877 + ... + 161019.

Almost surely, 2^9189876564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9189876564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12711543936).

9189876564 is an abundant number, since it is smaller than the sum of its proper divisors (16233211308).

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

9189876564 is a wasteful number, since it uses less digits than its factorization.

9189876564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74477 (or 74472 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 63.

The square root of 9189876564 is about 95863.8438828738. The cubic root of 9189876564 is about 2094.6102577356.

The spelling of 9189876564 in words is "nine billion, one hundred eighty-nine million, eight hundred seventy-six thousand, five hundred sixty-four".