128633408672779 has 2 divisors, whose sum is σ = 128633408672780. Its totient is φ = 128633408672778.

The previous prime is 128633408672767. The next prime is 128633408672863. The reversal of 128633408672779 is 977276804336821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128633408672779 - 2¹¹ = 128633408670731 is a prime.

It is not a weakly prime, because it can be changed into another prime (128633408672179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64316704336389 + 64316704336390.

It is an arithmetic number, because the mean of its divisors is an integer number (64316704336390).

Almost surely, 2^{128633408672779} is an apocalyptic number.

128633408672779 is a deficient number, since it is larger than the sum of its proper divisors (1).

128633408672779 is an equidigital number, since it uses as much as digits as its factorization.

128633408672779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024192512, while the sum is 73.

The spelling of 128633408672779 in words is "one hundred twenty-eight trillion, six hundred thirty-three billion, four hundred eight million, six hundred seventy-two thousand, seven hundred seventy-nine".