1205085397089 has 16 divisors (see below), whose sum is σ = 1885950892928. Its totient is φ = 670008868992.

The previous prime is 1205085397067. The next prime is 1205085397091. The reversal of 1205085397089 is 9807935805021.

It is not a de Polignac number, because 1205085397089 - 2⁷ = 1205085396961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1205085397189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 775472452 + ... + 775474005.

It is an arithmetic number, because the mean of its divisors is an integer number (117871930808).

Almost surely, 2^{1205085397089} is an apocalyptic number.

It is an amenable number.

1205085397089 is a deficient number, since it is larger than the sum of its proper divisors (680865495839).

1205085397089 is a wasteful number, since it uses less digits than its factorization.

1205085397089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550946504.

The product of its (nonzero) digits is 5443200, while the sum is 57.

The spelling of 1205085397089 in words is "one trillion, two hundred five billion, eighty-five million, three hundred ninety-seven thousand, eighty-nine".