8194511640 has 64 divisors (see below), whose sum is σ = 28095471360. Its totient is φ = 1873031040.

The previous prime is 8194511629. The next prime is 8194511641. The reversal of 8194511640 is 461154918.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8194511641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4876846 + ... + 4878525.

It is an arithmetic number, because the mean of its divisors is an integer number (438991740).

Almost surely, 2^8194511640 is an apocalyptic number.

It is an amenable number.

8194511640 is an abundant number, since it is smaller than the sum of its proper divisors (19900959720).

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

8194511640 is a wasteful number, since it uses less digits than its factorization.

8194511640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9755392 (or 9755388 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 8194511640 is about 90523.5419103782. The cubic root of 8194511640 is about 2016.0796788393.

The spelling of 8194511640 in words is "eight billion, one hundred ninety-four million, five hundred eleven thousand, six hundred forty".