126123726559 has 2 divisors, whose sum is σ = 126123726560. Its totient is φ = 126123726558.

The previous prime is 126123726481. The next prime is 126123726611. The reversal of 126123726559 is 955627321621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126123726559 - 2¹⁵ = 126123693791 is a prime.

It is a super-2 number, since 2×126123726559² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126123126559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63061863279 + 63061863280.

It is an arithmetic number, because the mean of its divisors is an integer number (63061863280).

Almost surely, 2^126123726559 is an apocalyptic number.

126123726559 is a deficient number, since it is larger than the sum of its proper divisors (1).

126123726559 is an equidigital number, since it uses as much as digits as its factorization.

126123726559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1360800, while the sum is 49.

The spelling of 126123726559 in words is "one hundred twenty-six billion, one hundred twenty-three million, seven hundred twenty-six thousand, five hundred fifty-nine".