126531444673 has 2 divisors, whose sum is σ = 126531444674. Its totient is φ = 126531444672.

The previous prime is 126531444643. The next prime is 126531444679. The reversal of 126531444673 is 376444135621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98049144384 + 28482300289 = 313128^2 + 168767^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126531444673 is a prime.

It is not a weakly prime, because it can be changed into another prime (126531444679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63265722336 + 63265722337.

It is an arithmetic number, because the mean of its divisors is an integer number (63265722337).

Almost surely, 2^126531444673 is an apocalyptic number.

It is an amenable number.

126531444673 is a deficient number, since it is larger than the sum of its proper divisors (1).

126531444673 is an equidigital number, since it uses as much as digits as its factorization.

126531444673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 46.

The spelling of 126531444673 in words is "one hundred twenty-six billion, five hundred thirty-one million, four hundred forty-four thousand, six hundred seventy-three".