180126897521 has 2 divisors, whose sum is σ = 180126897522. Its totient is φ = 180126897520.

The previous prime is 180126897479. The next prime is 180126897539. The reversal of 180126897521 is 125798621081.

180126897521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143270577121 + 36856320400 = 378511^2 + 191980^2 .

It is a cyclic number.

It is not a de Polignac number, because 180126897521 - 2³⁴ = 162947028337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 180126897521.

It is not a weakly prime, because it can be changed into another prime (180126897571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90063448760 + 90063448761.

It is an arithmetic number, because the mean of its divisors is an integer number (90063448761).

Almost surely, 2^180126897521 is an apocalyptic number.

It is an amenable number.

180126897521 is a deficient number, since it is larger than the sum of its proper divisors (1).

180126897521 is an equidigital number, since it uses as much as digits as its factorization.

180126897521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 50.

The spelling of 180126897521 in words is "one hundred eighty billion, one hundred twenty-six million, eight hundred ninety-seven thousand, five hundred twenty-one".