128229464609 has 2 divisors, whose sum is σ = 128229464610. Its totient is φ = 128229464608.

The previous prime is 128229464593. The next prime is 128229464617. The reversal of 128229464609 is 906464922821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73170250000 + 55059214609 = 270500^2 + 234647^2 .

It is an emirp because it is prime and its reverse (906464922821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128229464609 - 2⁴ = 128229464593 is a prime.

It is not a weakly prime, because it can be changed into another prime (128229454609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64114732304 + 64114732305.

It is an arithmetic number, because the mean of its divisors is an integer number (64114732305).

Almost surely, 2^128229464609 is an apocalyptic number.

It is an amenable number.

128229464609 is a deficient number, since it is larger than the sum of its proper divisors (1).

128229464609 is an equidigital number, since it uses as much as digits as its factorization.

128229464609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2985984, while the sum is 53.

The spelling of 128229464609 in words is "one hundred twenty-eight billion, two hundred twenty-nine million, four hundred sixty-four thousand, six hundred nine".