1002166595789 has 2 divisors, whose sum is σ = 1002166595790. Its totient is φ = 1002166595788.

The previous prime is 1002166595779. The next prime is 1002166595819. The reversal of 1002166595789 is 9875956612001.

1002166595789 is digitally balanced in base 2, 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., 616016207689 + 386150388100 = 784867^2 + 621410^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002166595789 - 2²⁰ = 1002165547213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002166595779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501083297894 + 501083297895.

It is an arithmetic number, because the mean of its divisors is an integer number (501083297895).

Almost surely, 2^{1002166595789} is an apocalyptic number.

It is an amenable number.

1002166595789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002166595789 is an equidigital number, since it uses as much as digits as its factorization.

1002166595789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8164800, while the sum is 59.

The spelling of 1002166595789 in words is "one trillion, two billion, one hundred sixty-six million, five hundred ninety-five thousand, seven hundred eighty-nine".