124387841857 has 2 divisors, whose sum is σ = 124387841858. Its totient is φ = 124387841856.

The previous prime is 124387841821. The next prime is 124387841917. The reversal of 124387841857 is 758148783421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113073477696 + 11314364161 = 336264^2 + 106369^2 .

It is a cyclic number.

It is not a de Polignac number, because 124387841857 - 2¹⁵ = 124387809089 is a prime.

It is not a weakly prime, because it can be changed into another prime (124387811857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62193920928 + 62193920929.

It is an arithmetic number, because the mean of its divisors is an integer number (62193920929).

Almost surely, 2^124387841857 is an apocalyptic number.

It is an amenable number.

124387841857 is a deficient number, since it is larger than the sum of its proper divisors (1).

124387841857 is an equidigital number, since it uses as much as digits as its factorization.

124387841857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12042240, while the sum is 58.

The spelling of 124387841857 in words is "one hundred twenty-four billion, three hundred eighty-seven million, eight hundred forty-one thousand, eight hundred fifty-seven".