128819478313 has 2 divisors, whose sum is σ = 128819478314. Its totient is φ = 128819478312.

The previous prime is 128819478301. The next prime is 128819478329. The reversal of 128819478313 is 313874918821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126983184409 + 1836293904 = 356347^2 + 42852^2 .

It is a cyclic number.

It is not a de Polignac number, because 128819478313 - 2²⁵ = 128785923881 is a prime.

It is not a weakly prime, because it can be changed into another prime (128819478353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64409739156 + 64409739157.

It is an arithmetic number, because the mean of its divisors is an integer number (64409739157).

Almost surely, 2^128819478313 is an apocalyptic number.

It is an amenable number.

128819478313 is a deficient number, since it is larger than the sum of its proper divisors (1).

128819478313 is an equidigital number, since it uses as much as digits as its factorization.

128819478313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2322432, while the sum is 55.

The spelling of 128819478313 in words is "one hundred twenty-eight billion, eight hundred nineteen million, four hundred seventy-eight thousand, three hundred thirteen".