7721985700 has 288 divisors, whose sum is σ = 21007405440. Its totient is φ = 2421964800.

The previous prime is 7721985697. The next prime is 7721985721. The reversal of 7721985700 is 75891277.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 26354754 + ... + 26355046.

It is an arithmetic number, because the mean of its divisors is an integer number (72942380).

Almost surely, 2^7721985700 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 7721985700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10503702720).

7721985700 is an abundant number, since it is smaller than the sum of its proper divisors (13285419740).

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

7721985700 is a wasteful number, since it uses less digits than its factorization.

7721985700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447 (or 440 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 46.

The square root of 7721985700 is about 87874.8297295648. The cubic root of 7721985700 is about 1976.5584622590.

The spelling of 7721985700 in words is "seven billion, seven hundred twenty-one million, nine hundred eighty-five thousand, seven hundred".