124878645722609 has 2 divisors, whose sum is σ = 124878645722610. Its totient is φ = 124878645722608.

The previous prime is 124878645722603. The next prime is 124878645722681. The reversal of 124878645722609 is 906227546878421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104966274543025 + 19912371179584 = 10245305^2 + 4462328^2 .

It is a cyclic number.

It is not a de Polignac number, because 124878645722609 - 2⁸ = 124878645722353 is a prime.

It is not a weakly prime, because it can be changed into another prime (124878645722603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62439322861304 + 62439322861305.

It is an arithmetic number, because the mean of its divisors is an integer number (62439322861305).

Almost surely, 2^{124878645722609} is an apocalyptic number.

It is an amenable number.

124878645722609 is a deficient number, since it is larger than the sum of its proper divisors (1).

124878645722609 is an equidigital number, since it uses as much as digits as its factorization.

124878645722609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 650280960, while the sum is 71.

The spelling of 124878645722609 in words is "one hundred twenty-four trillion, eight hundred seventy-eight billion, six hundred forty-five million, seven hundred twenty-two thousand, six hundred nine".