126605943673 has 6 divisors (see below), whose sum is σ = 139161905162. Its totient is φ = 115096312320.

The previous prime is 126605943637. The next prime is 126605943679. The reversal of 126605943673 is 376349506621.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 114547048704 + 12058894969 = 338448^2 + 109813^2 .

It is not a de Polignac number, because 126605943673 - 2⁹ = 126605943161 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 126605943673.

It is not an unprimeable number, because it can be changed into a prime (126605943679) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 523164936 + ... + 523165177.

Almost surely, 2^126605943673 is an apocalyptic number.

It is an amenable number.

126605943673 is a deficient number, since it is larger than the sum of its proper divisors (12555961489).

126605943673 is a wasteful number, since it uses less digits than its factorization.

126605943673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046330135 (or 1046330124 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 52.

The spelling of 126605943673 in words is "one hundred twenty-six billion, six hundred five million, nine hundred forty-three thousand, six hundred seventy-three".