126417935809 has 9 divisors (see below), whose sum is σ = 138959550849. Its totient is φ = 114921840660.

The previous prime is 126417935807. The next prime is 126417935827. The reversal of 126417935809 is 908539714621.

It is a happy number.

The square root of 126417935809 is 355553.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 126417935809 - 2¹ = 126417935807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126417935809.

It is not an unprimeable number, because it can be changed into a prime (126417935801) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3894922 + ... + 3927244.

It is a 1-persistent number, because it is pandigital, but 2⋅126417935809 = 252835871618 is not.

Almost surely, 2^126417935809 is an apocalyptic number.

126417935809 is the 355553-rd square number.

126417935809 is the 177777-th centered octagonal number.

It is an amenable number.

126417935809 is a deficient number, since it is larger than the sum of its proper divisors (12541615040).

126417935809 is an frugal number, since it uses more digits than its factorization.

126417935809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64668 (or 32334 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 126417935809 in words is "one hundred twenty-six billion, four hundred seventeen million, nine hundred thirty-five thousand, eight hundred nine".