1028264017985 has 16 divisors (see below), whose sum is σ = 1341810983376. Its totient is φ = 753297389568.

The previous prime is 1028264017943. The next prime is 1028264017993. The reversal of 1028264017985 is 5897104628201.

1028264017985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 2808046081 + 1025455971904 = 52991^2 + 1012648^2 .

It is a cyclic number.

It is not a de Polignac number, because 1028264017985 - 2¹⁰ = 1028264016961 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163472852 + ... + 163479141.

It is an arithmetic number, because the mean of its divisors is an integer number (83863186461).

Almost surely, 2^{1028264017985} is an apocalyptic number.

It is an amenable number.

1028264017985 is a deficient number, since it is larger than the sum of its proper divisors (313546965391).

1028264017985 is a wasteful number, since it uses less digits than its factorization.

1028264017985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326952052.

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 1028264017985 in words is "one trillion, twenty-eight billion, two hundred sixty-four million, seventeen thousand, nine hundred eighty-five".