8040745074721 has 2 divisors, whose sum is σ = 8040745074722. Its totient is φ = 8040745074720.

The previous prime is 8040745074599. The next prime is 8040745074731. The reversal of 8040745074721 is 1274705470408.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7708841190400 + 331903884321 = 2776480^2 + 576111^2 .

It is a cyclic number.

It is not a de Polignac number, because 8040745074721 - 2⁹ = 8040745074209 is a prime.

It is not a weakly prime, because it can be changed into another prime (8040745074731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4020372537360 + 4020372537361.

It is an arithmetic number, because the mean of its divisors is an integer number (4020372537361).

Almost surely, 2^{8040745074721} is an apocalyptic number.

It is an amenable number.

8040745074721 is a deficient number, since it is larger than the sum of its proper divisors (1).

8040745074721 is an equidigital number, since it uses as much as digits as its factorization.

8040745074721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1756160, while the sum is 49.

The spelling of 8040745074721 in words is "eight trillion, forty billion, seven hundred forty-five million, seventy-four thousand, seven hundred twenty-one".