128876678837 has 2 divisors, whose sum is σ = 128876678838. Its totient is φ = 128876678836.

The previous prime is 128876678809. The next prime is 128876678857. The reversal of 128876678837 is 738876678821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128478516721 + 398162116 = 358439^2 + 19954^2 .

It is a cyclic number.

It is not a de Polignac number, because 128876678837 - 2¹² = 128876674741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128876678857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64438339418 + 64438339419.

It is an arithmetic number, because the mean of its divisors is an integer number (64438339419).

Almost surely, 2^128876678837 is an apocalyptic number.

It is an amenable number.

128876678837 is a deficient number, since it is larger than the sum of its proper divisors (1).

128876678837 is an equidigital number, since it uses as much as digits as its factorization.

128876678837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 303464448, while the sum is 71.

The spelling of 128876678837 in words is "one hundred twenty-eight billion, eight hundred seventy-six million, six hundred seventy-eight thousand, eight hundred thirty-seven".