128378402229 has 16 divisors (see below), whose sum is σ = 213408253440. Its totient is φ = 66690078960.

The previous prime is 128378402183. The next prime is 128378402287. The reversal of 128378402229 is 922204873821.

It is not a de Polignac number, because 128378402229 - 2¹² = 128378398133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128378400229) 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, 277875099 + ... + 277875560.

It is an arithmetic number, because the mean of its divisors is an integer number (13338015840).

Almost surely, 2^128378402229 is an apocalyptic number.

It is an amenable number.

128378402229 is a deficient number, since it is larger than the sum of its proper divisors (85029851211).

128378402229 is a wasteful number, since it uses less digits than its factorization.

128378402229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555750680.

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 128378402229 in words is "one hundred twenty-eight billion, three hundred seventy-eight million, four hundred two thousand, two hundred twenty-nine".