126123126559 has 2 divisors, whose sum is σ = 126123126560. Its totient is φ = 126123126558.

The previous prime is 126123126557. The next prime is 126123126583. The reversal of 126123126559 is 955621321621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126123126559 - 2¹ = 126123126557 is a prime.

Together with 126123126557, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126123126557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63061563279 + 63061563280.

It is an arithmetic number, because the mean of its divisors is an integer number (63061563280).

Almost surely, 2^126123126559 is an apocalyptic number.

126123126559 is a deficient number, since it is larger than the sum of its proper divisors (1).

126123126559 is an equidigital number, since it uses as much as digits as its factorization.

126123126559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 43.

The spelling of 126123126559 in words is "one hundred twenty-six billion, one hundred twenty-three million, one hundred twenty-six thousand, five hundred fifty-nine".