126367940609 has 2 divisors, whose sum is σ = 126367940610. Its totient is φ = 126367940608.

The previous prime is 126367940603. The next prime is 126367940653. The reversal of 126367940609 is 906049763621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76370980609 + 49996960000 = 276353^2 + 223600^2 .

It is an emirp because it is prime and its reverse (906049763621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126367940609 is a prime.

It is not a weakly prime, because it can be changed into another prime (126367940603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63183970304 + 63183970305.

It is an arithmetic number, because the mean of its divisors is an integer number (63183970305).

Almost surely, 2^126367940609 is an apocalyptic number.

It is an amenable number.

126367940609 is a deficient number, since it is larger than the sum of its proper divisors (1).

126367940609 is an equidigital number, since it uses as much as digits as its factorization.

126367940609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2939328, while the sum is 53.

The spelling of 126367940609 in words is "one hundred twenty-six billion, three hundred sixty-seven million, nine hundred forty thousand, six hundred nine".