8188468644 has 12 divisors (see below), whose sum is σ = 19106426864. Its totient is φ = 2729489544.

The previous prime is 8188468643. The next prime is 8188468663. The reversal of 8188468644 is 4468648818.

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

It is not an unprimeable number, because it can be changed into a prime (8188468643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341186182 + ... + 341186205.

Almost surely, 2^8188468644 is an apocalyptic number.

It is an amenable number.

8188468644 is an abundant number, since it is smaller than the sum of its proper divisors (10917958220).

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

8188468644 is a wasteful number, since it uses less digits than its factorization.

8188468644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682372394 (or 682372392 counting only the distinct ones).

The product of its digits is 9437184, while the sum is 57.

The square root of 8188468644 is about 90490.1577189475. The cubic root of 8188468644 is about 2015.5839748040.

The spelling of 8188468644 in words is "eight billion, one hundred eighty-eight million, four hundred sixty-eight thousand, six hundred forty-four".