8680720842 has 12 divisors (see below), whose sum is σ = 18808228530. Its totient is φ = 2893573608.

The previous prime is 8680720793. The next prime is 8680720861. The reversal of 8680720842 is 2480270868.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7049449521 + 1631271321 = 83961^2 + 40389^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 241131117 + ... + 241131152.

Almost surely, 2^8680720842 is an apocalyptic number.

8680720842 is an abundant number, since it is smaller than the sum of its proper divisors (10127507688).

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

8680720842 is a wasteful number, since it uses less digits than its factorization.

8680720842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482262277 (or 482262274 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 45.

The square root of 8680720842 is about 93170.3860784101. The cubic root of 8680720842 is about 2055.1897727315.

The spelling of 8680720842 in words is "eight billion, six hundred eighty million, seven hundred twenty thousand, eight hundred forty-two".