126165737543 has 2 divisors, whose sum is σ = 126165737544. Its totient is φ = 126165737542.

The previous prime is 126165737521. The next prime is 126165737557. The reversal of 126165737543 is 345737561621.

It is a strong prime.

It is an emirp because it is prime and its reverse (345737561621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126165737543 - 2²⁰ = 126164688967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 126165737491 and 126165737500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126165737513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63082868771 + 63082868772.

It is an arithmetic number, because the mean of its divisors is an integer number (63082868772).

Almost surely, 2^126165737543 is an apocalyptic number.

126165737543 is a deficient number, since it is larger than the sum of its proper divisors (1).

126165737543 is an equidigital number, since it uses as much as digits as its factorization.

126165737543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3175200, while the sum is 50.

The spelling of 126165737543 in words is "one hundred twenty-six billion, one hundred sixty-five million, seven hundred thirty-seven thousand, five hundred forty-three".