124555678889 has 2 divisors, whose sum is σ = 124555678890. Its totient is φ = 124555678888.

The previous prime is 124555678883. The next prime is 124555678901. The reversal of 124555678889 is 988876555421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122636538025 + 1919140864 = 350195^2 + 43808^2 .

It is a cyclic number.

It is not a de Polignac number, because 124555678889 - 2⁴ = 124555678873 is a prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (124555678883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62277839444 + 62277839445.

It is an arithmetic number, because the mean of its divisors is an integer number (62277839445).

Almost surely, 2^124555678889 is an apocalyptic number.

It is an amenable number.

124555678889 is a deficient number, since it is larger than the sum of its proper divisors (1).

124555678889 is an equidigital number, since it uses as much as digits as its factorization.

124555678889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536000, while the sum is 68.

The spelling of 124555678889 in words is "one hundred twenty-four billion, five hundred fifty-five million, six hundred seventy-eight thousand, eight hundred eighty-nine".