8064450721 has 2 divisors, whose sum is σ = 8064450722. Its totient is φ = 8064450720.

The previous prime is 8064450661. The next prime is 8064450749. The reversal of 8064450721 is 1270544608.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7433888400 + 630562321 = 86220^2 + 25111^2 .

It is a cyclic number.

It is not a de Polignac number, because 8064450721 - 2⁷ = 8064450593 is a prime.

It is not a weakly prime, because it can be changed into another prime (8064450221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4032225360 + 4032225361.

It is an arithmetic number, because the mean of its divisors is an integer number (4032225361).

Almost surely, 2^8064450721 is an apocalyptic number.

It is an amenable number.

8064450721 is a deficient number, since it is larger than the sum of its proper divisors (1).

8064450721 is an equidigital number, since it uses as much as digits as its factorization.

8064450721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 8064450721 is about 89802.2868361380. The cubic root of 8064450721 is about 2005.3565343787.

The spelling of 8064450721 in words is "eight billion, sixty-four million, four hundred fifty thousand, seven hundred twenty-one".