7215723648 has 224 divisors, whose sum is σ = 24633946560. Its totient is φ = 2061448704.

The previous prime is 7215723629. The next prime is 7215723667. The reversal of 7215723648 is 8463275127.

7215723648 is a `hidden beast` number, since 7 + 2 + 1 + 572 + 36 + 48 = 666.

It is an interprime number because it is at equal distance from previous prime (7215723629) and next prime (7215723667).

It is a tau number, because it is divible by the number of its divisors (224).

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 647661 + ... + 658707.

Almost surely, 2^7215723648 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 7215723648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12316973280).

7215723648 is an abundant number, since it is smaller than the sum of its proper divisors (17418222912).

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

7215723648 is an equidigital number, since it uses as much as digits as its factorization.

7215723648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11086 (or 11059 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 7215723648 is about 84945.4156973759. The cubic root of 7215723648 is about 1932.3833967714.

The spelling of 7215723648 in words is "seven billion, two hundred fifteen million, seven hundred twenty-three thousand, six hundred forty-eight".