124162721549 has 2 divisors, whose sum is σ = 124162721550. Its totient is φ = 124162721548.

The previous prime is 124162721521. The next prime is 124162721587. The reversal of 124162721549 is 945127261421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123671788900 + 490932649 = 351670^2 + 22157^2 .

It is a cyclic number.

It is not a de Polignac number, because 124162721549 - 2¹² = 124162717453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124162721519) 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, 62081360774 + 62081360775.

It is an arithmetic number, because the mean of its divisors is an integer number (62081360775).

Almost surely, 2^124162721549 is an apocalyptic number.

It is an amenable number.

124162721549 is a deficient number, since it is larger than the sum of its proper divisors (1).

124162721549 is an equidigital number, since it uses as much as digits as its factorization.

124162721549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 44.

The spelling of 124162721549 in words is "one hundred twenty-four billion, one hundred sixty-two million, seven hundred twenty-one thousand, five hundred forty-nine".