8324468721 has 12 divisors (see below), whose sum is σ = 12035886148. Its totient is φ = 5544267264.

The previous prime is 8324468687. The next prime is 8324468731. The reversal of 8324468721 is 1278644238.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7879047696 + 445421025 = 88764^2 + 21105^2 .

It is not a de Polignac number, because 8324468721 - 2¹⁴ = 8324452337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8324468731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 438400 + ... + 456993.

Almost surely, 2^8324468721 is an apocalyptic number.

It is an amenable number.

8324468721 is a deficient number, since it is larger than the sum of its proper divisors (3711417427).

8324468721 is a wasteful number, since it uses less digits than its factorization.

8324468721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896432 (or 896429 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The square root of 8324468721 is about 91238.5265170367. The cubic root of 8324468721 is about 2026.6815252973.

The spelling of 8324468721 in words is "eight billion, three hundred twenty-four million, four hundred sixty-eight thousand, seven hundred twenty-one".