7681530820 has 48 divisors (see below), whose sum is σ = 16272023040. Its totient is φ = 3045901824.

The previous prime is 7681530763. The next prime is 7681530821. The reversal of 7681530820 is 280351867.

It is not an unprimeable number, because it can be changed into a prime (7681530821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1203277 + ... + 1209643.

It is an arithmetic number, because the mean of its divisors is an integer number (339000480).

Almost surely, 2^7681530820 is an apocalyptic number.

It is an amenable number.

7681530820 is an abundant number, since it is smaller than the sum of its proper divisors (8590492220).

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

7681530820 is a wasteful number, since it uses less digits than its factorization.

7681530820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6892 (or 6890 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 7681530820 is about 87644.3427723661. The cubic root of 7681530820 is about 1973.1007384906.

The spelling of 7681530820 in words is "seven billion, six hundred eighty-one million, five hundred thirty thousand, eight hundred twenty".