128611206403 has 2 divisors, whose sum is σ = 128611206404. Its totient is φ = 128611206402.

The previous prime is 128611206379. The next prime is 128611206419. The reversal of 128611206403 is 304602116821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128611206403 - 2¹⁷ = 128611075331 is a prime.

It is not a weakly prime, because it can be changed into another prime (128611206803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64305603201 + 64305603202.

It is an arithmetic number, because the mean of its divisors is an integer number (64305603202).

Almost surely, 2^128611206403 is an apocalyptic number.

128611206403 is a deficient number, since it is larger than the sum of its proper divisors (1).

128611206403 is an equidigital number, since it uses as much as digits as its factorization.

128611206403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 34.

The spelling of 128611206403 in words is "one hundred twenty-eight billion, six hundred eleven million, two hundred six thousand, four hundred three".