126091140509 has 2 divisors, whose sum is σ = 126091140510. Its totient is φ = 126091140508.

The previous prime is 126091140503. The next prime is 126091140529. The reversal of 126091140509 is 905041190621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67212118009 + 58879022500 = 259253^2 + 242650^2 .

It is a cyclic number.

It is not a de Polignac number, because 126091140509 - 2⁴ = 126091140493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126091140503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63045570254 + 63045570255.

It is an arithmetic number, because the mean of its divisors is an integer number (63045570255).

Almost surely, 2^126091140509 is an apocalyptic number.

It is an amenable number.

126091140509 is a deficient number, since it is larger than the sum of its proper divisors (1).

126091140509 is an equidigital number, since it uses as much as digits as its factorization.

126091140509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 38.

The spelling of 126091140509 in words is "one hundred twenty-six billion, ninety-one million, one hundred forty thousand, five hundred nine".