128137168 has 10 divisors (see below), whose sum is σ = 248265794. Its totient is φ = 64068576.

The previous prime is 128137157. The next prime is 128137183. The reversal of 128137168 is 861731821.

It can be written as a sum of positive squares in only one way, i.e., 71707024 + 56430144 = 8468^2 + 7512^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4004271 + ... + 4004302.

Almost surely, 2^128137168 is an apocalyptic number.

It is an amenable number.

128137168 is a deficient number, since it is larger than the sum of its proper divisors (120128626).

128137168 is an equidigital number, since it uses as much as digits as its factorization.

128137168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8008581 (or 8008575 counting only the distinct ones).

The product of its digits is 16128, while the sum is 37.

The square root of 128137168 is about 11319.7689022347. The cubic root of 128137168 is about 504.1483774103.

Adding to 128137168 its reverse (861731821), we get a palindrome (989868989).

The spelling of 128137168 in words is "one hundred twenty-eight million, one hundred thirty-seven thousand, one hundred sixty-eight".