123286912689885 has 64 divisors (see below), whose sum is σ = 243092038533120. Its totient is φ = 52091151045120.

The previous prime is 123286912689851. The next prime is 123286912689901. The reversal of 123286912689885 is 588986219682321.

It is not a de Polignac number, because 123286912689885 - 2¹⁰ = 123286912688861 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123286912689885.

It is a congruent number.

It is an unprimeable number.

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 in 63 ways as a sum of consecutive naturals, for example, 753551757 + ... + 753715346.

It is an arithmetic number, because the mean of its divisors is an integer number (3798313102080).

Almost surely, 2^{123286912689885} is an apocalyptic number.

123286912689885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123286912689885 is a deficient number, since it is larger than the sum of its proper divisors (119805125843235).

123286912689885 is a wasteful number, since it uses less digits than its factorization.

123286912689885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507267178.

The product of its digits is 1433272320, while the sum is 78.

The spelling of 123286912689885 in words is "one hundred twenty-three trillion, two hundred eighty-six billion, nine hundred twelve million, six hundred eighty-nine thousand, eight hundred eighty-five".