128877682169 has 2 divisors, whose sum is σ = 128877682170. Its totient is φ = 128877682168.

The previous prime is 128877682127. The next prime is 128877682183. The reversal of 128877682169 is 961286778821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104506725625 + 24370956544 = 323275^2 + 156112^2 .

It is a cyclic number.

It is not a de Polignac number, because 128877682169 - 2¹² = 128877678073 is a prime.

It is a super-2 number, since 2×128877682169² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128877682189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64438841084 + 64438841085.

It is an arithmetic number, because the mean of its divisors is an integer number (64438841085).

Almost surely, 2^128877682169 is an apocalyptic number.

It is an amenable number.

128877682169 is a deficient number, since it is larger than the sum of its proper divisors (1).

128877682169 is an equidigital number, since it uses as much as digits as its factorization.

128877682169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32514048, while the sum is 65.

The spelling of 128877682169 in words is "one hundred twenty-eight billion, eight hundred seventy-seven million, six hundred eighty-two thousand, one hundred sixty-nine".