124878645722681 has 2 divisors, whose sum is σ = 124878645722682. Its totient is φ = 124878645722680.

The previous prime is 124878645722609. The next prime is 124878645722689. The reversal of 124878645722681 is 186227546878421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96246086839081 + 28632558883600 = 9810509^2 + 5350940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124878645722681 is a prime.

It is a super-2 number, since 2×124878645722681² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (124878645722689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62439322861340 + 62439322861341.

It is an arithmetic number, because the mean of its divisors is an integer number (62439322861341).

Almost surely, 2^{124878645722681} is an apocalyptic number.

It is an amenable number.

124878645722681 is a deficient number, since it is larger than the sum of its proper divisors (1).

124878645722681 is an equidigital number, since it uses as much as digits as its factorization.

124878645722681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 578027520, while the sum is 71.

The spelling of 124878645722681 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 eighty-one".