7901220018089 has 2 divisors, whose sum is σ = 7901220018090. Its totient is φ = 7901220018088.

The previous prime is 7901220018067. The next prime is 7901220018103. The reversal of 7901220018089 is 9808100221097.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4725767297689 + 3175452720400 = 2173883^2 + 1781980^2 .

It is a cyclic number.

It is not a de Polignac number, because 7901220018089 - 2²⁸ = 7900951582633 is a prime.

It is not a weakly prime, because it can be changed into another prime (7901220018019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3950610009044 + 3950610009045.

It is an arithmetic number, because the mean of its divisors is an integer number (3950610009045).

Almost surely, 2^{7901220018089} is an apocalyptic number.

It is an amenable number.

7901220018089 is a deficient number, since it is larger than the sum of its proper divisors (1).

7901220018089 is an equidigital number, since it uses as much as digits as its factorization.

7901220018089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 47.

The spelling of 7901220018089 in words is "seven trillion, nine hundred one billion, two hundred twenty million, eighteen thousand, eighty-nine".