8243809680720 has 40 divisors (see below), whose sum is σ = 25555810010976. Its totient is φ = 2198349248128.

The previous prime is 8243809680697. The next prime is 8243809680761. The reversal of 8243809680720 is 270869083428.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17174603262 + ... + 17174603741.

Almost surely, 2^{8243809680720} is an apocalyptic number.

8243809680720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8243809680720 is an abundant number, since it is smaller than the sum of its proper divisors (17312000330256).

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

8243809680720 is a wasteful number, since it uses less digits than its factorization.

8243809680720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34349207019 (or 34349207013 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 57.

The spelling of 8243809680720 in words is "eight trillion, two hundred forty-three billion, eight hundred nine million, six hundred eighty thousand, seven hundred twenty".