7442890561 has 2 divisors, whose sum is σ = 7442890562. Its totient is φ = 7442890560.

The previous prime is 7442890549. The next prime is 7442890579. The reversal of 7442890561 is 1650982447.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7272848961 + 170041600 = 85281^2 + 13040^2 .

It is a cyclic number.

It is not a de Polignac number, because 7442890561 - 2⁵ = 7442890529 is a prime.

It is not a weakly prime, because it can be changed into another prime (7442890591) 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 as a sum of consecutive naturals, namely, 3721445280 + 3721445281.

It is an arithmetic number, because the mean of its divisors is an integer number (3721445281).

Almost surely, 2^7442890561 is an apocalyptic number.

It is an amenable number.

7442890561 is a deficient number, since it is larger than the sum of its proper divisors (1).

7442890561 is an equidigital number, since it uses as much as digits as its factorization.

7442890561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 46.

The square root of 7442890561 is about 86272.1888038086. The cubic root of 7442890561 is about 1952.4528030876.

The spelling of 7442890561 in words is "seven billion, four hundred forty-two million, eight hundred ninety thousand, five hundred sixty-one".