7963182721 has 8 divisors (see below), whose sum is σ = 9080190504. Its totient is φ = 6918240000.

The previous prime is 7963182709. The next prime is 7963182737. The reversal of 7963182721 is 1272813697.

It can be written as a sum of positive squares in 4 ways, for example, as 119025 + 7963063696 = 345^2 + 89236^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7963182721 - 2¹⁹ = 7962658433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7963182791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18016030 + ... + 18016471.

It is an arithmetic number, because the mean of its divisors is an integer number (1135023813).

Almost surely, 2^7963182721 is an apocalyptic number.

It is an amenable number.

7963182721 is a deficient number, since it is larger than the sum of its proper divisors (1117007783).

7963182721 is a wasteful number, since it uses less digits than its factorization.

7963182721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36032531.

The product of its digits is 254016, while the sum is 46.

The square root of 7963182721 is about 89236.6669088441. Note that the first 3 decimals coincide. The cubic root of 7963182721 is about 1996.9271747069.

The spelling of 7963182721 in words is "seven billion, nine hundred sixty-three million, one hundred eighty-two thousand, seven hundred twenty-one".