128758772806778 has 16 divisors (see below), whose sum is σ = 193401146148000. Its totient is φ = 64291725566352.

The previous prime is 128758772806693. The next prime is 128758772806823. The reversal of 128758772806778 is 877608277857821.

It is a junction number, because it is equal to n+sod(n) for n = 128758772806696 and 128758772806705.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218241008 + ... + 218830196.

It is an arithmetic number, because the mean of its divisors is an integer number (12087571634250).

Almost surely, 2^{128758772806778} is an apocalyptic number.

128758772806778 is a deficient number, since it is larger than the sum of its proper divisors (64642373341222).

128758772806778 is a wasteful number, since it uses less digits than its factorization.

128758772806778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737789.

The product of its (nonzero) digits is 8260976640, while the sum is 83.

The spelling of 128758772806778 in words is "one hundred twenty-eight trillion, seven hundred fifty-eight billion, seven hundred seventy-two million, eight hundred six thousand, seven hundred seventy-eight".