128913582877 has 2 divisors, whose sum is σ = 128913582878. Its totient is φ = 128913582876.

The previous prime is 128913582859. The next prime is 128913582881. The reversal of 128913582877 is 778285319821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128729546521 + 184036356 = 358789^2 + 13566^2 .

It is an emirp because it is prime and its reverse (778285319821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128913582877 - 2²³ = 128905194269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128913586877) 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, 64456791438 + 64456791439.

It is an arithmetic number, because the mean of its divisors is an integer number (64456791439).

Almost surely, 2^128913582877 is an apocalyptic number.

It is an amenable number.

128913582877 is a deficient number, since it is larger than the sum of its proper divisors (1).

128913582877 is an equidigital number, since it uses as much as digits as its factorization.

128913582877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13547520, while the sum is 61.

The spelling of 128913582877 in words is "one hundred twenty-eight billion, nine hundred thirteen million, five hundred eighty-two thousand, eight hundred seventy-seven".