128475778663 has 2 divisors, whose sum is σ = 128475778664. Its totient is φ = 128475778662.

The previous prime is 128475778573. The next prime is 128475778679. The reversal of 128475778663 is 366877574821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128475778663 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128475778595 and 128475778604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128475778693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64237889331 + 64237889332.

It is an arithmetic number, because the mean of its divisors is an integer number (64237889332).

Almost surely, 2^128475778663 is an apocalyptic number.

128475778663 is a deficient number, since it is larger than the sum of its proper divisors (1).

128475778663 is an equidigital number, since it uses as much as digits as its factorization.

128475778663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94832640, while the sum is 64.

The spelling of 128475778663 in words is "one hundred twenty-eight billion, four hundred seventy-five million, seven hundred seventy-eight thousand, six hundred sixty-three".