128710890169 has 27 divisors (see below), whose sum is σ = 135729028197. Its totient is φ = 122051172600.

The previous prime is 128710890137. The next prime is 128710890197. The reversal of 128710890169 is 961098017821.

The square root of 128710890169 is 358763.

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

It is not a de Polignac number, because 128710890169 - 2⁵ = 128710890137 is a prime.

It is a super-2 number, since 2×128710890169² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128710890109) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 789637282 + ... + 789637444.

Almost surely, 2^128710890169 is an apocalyptic number.

128710890169 is the 358763-rd square number.

128710890169 is the 179382-nd centered octagonal number.

It is an amenable number.

128710890169 is a deficient number, since it is larger than the sum of its proper divisors (7018138028).

128710890169 is an frugal number, since it uses more digits than its factorization.

128710890169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 52.

The spelling of 128710890169 in words is "one hundred twenty-eight billion, seven hundred ten million, eight hundred ninety thousand, one hundred sixty-nine".