128346128277 has 16 divisors (see below), whose sum is σ = 180156361920.
Its totient is φ = 81051062400.
The previous prime is 128346128243. The next prime is 128346128321. The reversal of 128346128277 is 772821643821.
It is a happy number.
It is not a de Polignac number, because 128346128277 - 26 = 128346128213 is a prime.
It is a super-2 number, since 2×1283461282772 (a number of 23 digits) contains 22 as substring.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (128346123277) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 365127 + ... + 624507.
It is an arithmetic number, because the mean of its divisors is an integer number (11259772620).
Almost surely, 2128346128277 is an apocalyptic number.
It is an amenable number.
128346128277 is a deficient number, since it is larger than the sum of its proper divisors (51810233643).
128346128277 is a wasteful number, since it uses less digits than its factorization.
128346128277 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 268084.
The product of its digits is 1806336, while the sum is 51.
The spelling of 128346128277 in words is "one hundred twenty-eight billion, three hundred forty-six million, one hundred twenty-eight thousand, two hundred seventy-seven".