7720634856 has 128 divisors (see below), whose sum is σ = 21444341760. Its totient is φ = 2296761600.

The previous prime is 7720634843. The next prime is 7720634879. The reversal of 7720634856 is 6584360277.

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 31 ways as a sum of consecutive naturals, for example, 5191345 + ... + 5192831.

It is an arithmetic number, because the mean of its divisors is an integer number (167533920).

Almost surely, 2^7720634856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7720634856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10722170880).

7720634856 is an abundant number, since it is smaller than the sum of its proper divisors (13723706904).

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

7720634856 is a wasteful number, since it uses less digits than its factorization.

7720634856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855 (or 1851 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 48.

The square root of 7720634856 is about 87867.1432106450. The cubic root of 7720634856 is about 1976.4431992532.

The spelling of 7720634856 in words is "seven billion, seven hundred twenty million, six hundred thirty-four thousand, eight hundred fifty-six".