1028169636169 has 9 divisors (see below), whose sum is σ = 1113357726183. Its totient is φ = 949067496312.

The previous prime is 1028169636103. The next prime is 1028169636217. The reversal of 1028169636169 is 9616369618201.

It is a happy number.

The square root of 1028169636169 is 1013987.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 152096100025 + 876073536144 = 389995^2 + 935988^2 .

It is not a de Polignac number, because 1028169636169 - 2²⁵ = 1028136081737 is a prime.

It is a super-2 number, since 2×1028169636169² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1028169631169) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 13142832 + ... + 13220830.

Almost surely, 2^{1028169636169} is an apocalyptic number.

1028169636169 is the 1013987-th square number.

1028169636169 is the 506994-th centered octagonal number.

It is an amenable number.

1028169636169 is a deficient number, since it is larger than the sum of its proper divisors (85188090014).

1028169636169 is an frugal number, since it uses more digits than its factorization.

1028169636169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156024 (or 78012 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 58.

The spelling of 1028169636169 in words is "one trillion, twenty-eight billion, one hundred sixty-nine million, six hundred thirty-six thousand, one hundred sixty-nine".