172426873605 has 16 divisors (see below), whose sum is σ = 315294854784. Its totient is φ = 78823713600.

The previous prime is 172426873589. The next prime is 172426873631. The reversal of 172426873605 is 506378624271.

It is a happy number.

It is not a de Polignac number, because 172426873605 - 2⁴ = 172426873589 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 821080246 + ... + 821080455.

It is an arithmetic number, because the mean of its divisors is an integer number (19705928424).

Almost surely, 2^172426873605 is an apocalyptic number.

172426873605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172426873605 is a deficient number, since it is larger than the sum of its proper divisors (142867981179).

172426873605 is a wasteful number, since it uses less digits than its factorization.

172426873605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642160716.

The product of its (nonzero) digits is 3386880, while the sum is 51.

The spelling of 172426873605 in words is "one hundred seventy-two billion, four hundred twenty-six million, eight hundred seventy-three thousand, six hundred five".