126423544019 has 2 divisors, whose sum is σ = 126423544020. Its totient is φ = 126423544018.

The previous prime is 126423544001. The next prime is 126423544031. The reversal of 126423544019 is 910445324621.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126423544019 is a prime.

It is a super-2 number, since 2×126423544019² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126423544069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63211772009 + 63211772010.

It is an arithmetic number, because the mean of its divisors is an integer number (63211772010).

Almost surely, 2^126423544019 is an apocalyptic number.

126423544019 is a deficient number, since it is larger than the sum of its proper divisors (1).

126423544019 is an equidigital number, since it uses as much as digits as its factorization.

126423544019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 126423544019 in words is "one hundred twenty-six billion, four hundred twenty-three million, five hundred forty-four thousand, nineteen".