126435738991 has 2 divisors, whose sum is σ = 126435738992. Its totient is φ = 126435738990.

The previous prime is 126435738983. The next prime is 126435739049. The reversal of 126435738991 is 199837534621.

It is a happy number.

It is an a-pointer prime, because the next prime (126435739049) can be obtained adding 126435738991 to its sum of digits (58).

It is a weak prime.

It is an emirp because it is prime and its reverse (199837534621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126435738991 - 2³ = 126435738983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126435738491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63217869495 + 63217869496.

It is an arithmetic number, because the mean of its divisors is an integer number (63217869496).

Almost surely, 2^126435738991 is an apocalyptic number.

126435738991 is a deficient number, since it is larger than the sum of its proper divisors (1).

126435738991 is an equidigital number, since it uses as much as digits as its factorization.

126435738991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9797760, while the sum is 58.

The spelling of 126435738991 in words is "one hundred twenty-six billion, four hundred thirty-five million, seven hundred thirty-eight thousand, nine hundred ninety-one".