7165975640321 has 2 divisors, whose sum is σ = 7165975640322. Its totient is φ = 7165975640320.

The previous prime is 7165975640287. The next prime is 7165975640357. The reversal of 7165975640321 is 1230465795617.

7165975640321 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5308710916096 + 1857264724225 = 2304064^2 + 1362815^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7165975640321 is a prime.

It is not a weakly prime, because it can be changed into another prime (7165975600321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3582987820160 + 3582987820161.

It is an arithmetic number, because the mean of its divisors is an integer number (3582987820161).

Almost surely, 2^{7165975640321} is an apocalyptic number.

It is an amenable number.

7165975640321 is a deficient number, since it is larger than the sum of its proper divisors (1).

7165975640321 is an equidigital number, since it uses as much as digits as its factorization.

7165975640321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9525600, while the sum is 56.

The spelling of 7165975640321 in words is "seven trillion, one hundred sixty-five billion, nine hundred seventy-five million, six hundred forty thousand, three hundred twenty-one".