7455742375321 has 2 divisors, whose sum is σ = 7455742375322. Its totient is φ = 7455742375320.

The previous prime is 7455742375309. The next prime is 7455742375363. The reversal of 7455742375321 is 1235732475547.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4731473288025 + 2724269087296 = 2175195^2 + 1650536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7455742375321 is a prime.

It is not a weakly prime, because it can be changed into another prime (7455742379321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3727871187660 + 3727871187661.

It is an arithmetic number, because the mean of its divisors is an integer number (3727871187661).

Almost surely, 2^{7455742375321} is an apocalyptic number.

It is an amenable number.

7455742375321 is a deficient number, since it is larger than the sum of its proper divisors (1).

7455742375321 is an equidigital number, since it uses as much as digits as its factorization.

7455742375321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24696000, while the sum is 55.

The spelling of 7455742375321 in words is "seven trillion, four hundred fifty-five billion, seven hundred forty-two million, three hundred seventy-five thousand, three hundred twenty-one".