126418528729 has 2 divisors, whose sum is σ = 126418528730. Its totient is φ = 126418528728.

The previous prime is 126418528721. The next prime is 126418528751. The reversal of 126418528729 is 927825814621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70036976025 + 56381552704 = 264645^2 + 237448^2 .

It is a cyclic number.

It is not a de Polignac number, because 126418528729 - 2³ = 126418528721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126418528729.

It is not a weakly prime, because it can be changed into another prime (126418528721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63209264364 + 63209264365.

It is an arithmetic number, because the mean of its divisors is an integer number (63209264365).

Almost surely, 2^126418528729 is an apocalyptic number.

It is an amenable number.

126418528729 is a deficient number, since it is larger than the sum of its proper divisors (1).

126418528729 is an equidigital number, since it uses as much as digits as its factorization.

126418528729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3870720, while the sum is 55.

The spelling of 126418528729 in words is "one hundred twenty-six billion, four hundred eighteen million, five hundred twenty-eight thousand, seven hundred twenty-nine".