7721600000 has 264 divisors, whose sum is σ = 20468689920. Its totient is φ = 2903040000.

The previous prime is 7721599979. The next prime is 7721600011. The reversal of 7721600000 is 61277.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60799937 + ... + 60800063.

Almost surely, 2^7721600000 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 7721600000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10234344960).

7721600000 is an abundant number, since it is smaller than the sum of its proper divisors (12747089920).

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

7721600000 is an equidigital number, since it uses as much as digits as its factorization.

7721600000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 23.

The square root of 7721600000 is about 87872.6351033130. The cubic root of 7721600000 is about 1976.5255531377.

Adding to 7721600000 its reverse (61277), we get a palindrome (7721661277).

The spelling of 7721600000 in words is "seven billion, seven hundred twenty-one million, six hundred thousand".