8140565680 has 80 divisors (see below), whose sum is σ = 20479876704. Its totient is φ = 2991421440.

The previous prime is 8140565677. The next prime is 8140565711. The reversal of 8140565680 is 865650418.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

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, 200892 + ... + 237988.

Almost surely, 2^8140565680 is an apocalyptic number.

8140565680 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8140565680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10239938352).

8140565680 is an abundant number, since it is smaller than the sum of its proper divisors (12339311024).

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

8140565680 is a wasteful number, since it uses less digits than its factorization.

8140565680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37334 (or 37328 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 43.

The square root of 8140565680 is about 90225.0834302745. The cubic root of 8140565680 is about 2011.6458619923.

The spelling of 8140565680 in words is "eight billion, one hundred forty million, five hundred sixty-five thousand, six hundred eighty".