126405311605 has 64 divisors (see below), whose sum is σ = 166366586880. Its totient is φ = 91830472704.

The previous prime is 126405311597. The next prime is 126405311623. The reversal of 126405311605 is 506113504621.

It is not a de Polignac number, because 126405311605 - 2³ = 126405311597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 113980791 + ... + 113981899.

It is an arithmetic number, because the mean of its divisors is an integer number (2599477920).

Almost surely, 2^126405311605 is an apocalyptic number.

It is an amenable number.

126405311605 is a deficient number, since it is larger than the sum of its proper divisors (39961275275).

126405311605 is a wasteful number, since it uses less digits than its factorization.

126405311605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 126405311605 in words is "one hundred twenty-six billion, four hundred five million, three hundred eleven thousand, six hundred five".