124478528789 has 2 divisors, whose sum is σ = 124478528790. Its totient is φ = 124478528788.

The previous prime is 124478528777. The next prime is 124478528819. The reversal of 124478528789 is 987825874421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98198876689 + 26279652100 = 313367^2 + 162110^2 .

It is a cyclic number.

It is not a de Polignac number, because 124478528789 - 2⁴ = 124478528773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124478528719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62239264394 + 62239264395.

It is an arithmetic number, because the mean of its divisors is an integer number (62239264395).

Almost surely, 2^124478528789 is an apocalyptic number.

It is an amenable number.

124478528789 is a deficient number, since it is larger than the sum of its proper divisors (1).

124478528789 is an equidigital number, since it uses as much as digits as its factorization.

124478528789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72253440, while the sum is 65.

The spelling of 124478528789 in words is "one hundred twenty-four billion, four hundred seventy-eight million, five hundred twenty-eight thousand, seven hundred eighty-nine".