1028165987199 has 32 divisors (see below), whose sum is σ = 1477837025280. Its totient is φ = 632076766848.

The previous prime is 1028165987117. The next prime is 1028165987203. The reversal of 1028165987199 is 9917895618201.

It is not a de Polignac number, because 1028165987199 - 2¹¹ = 1028165985151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028165987899) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 301248217 + ... + 301251629.

It is an arithmetic number, because the mean of its divisors is an integer number (46182407040).

Almost surely, 2^{1028165987199} is an apocalyptic number.

1028165987199 is a deficient number, since it is larger than the sum of its proper divisors (449671038081).

1028165987199 is a wasteful number, since it uses less digits than its factorization.

1028165987199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8991.

The product of its (nonzero) digits is 19595520, while the sum is 66.

The spelling of 1028165987199 in words is "one trillion, twenty-eight billion, one hundred sixty-five million, nine hundred eighty-seven thousand, one hundred ninety-nine".