123705038505 has 32 divisors (see below), whose sum is σ = 206556606720. Its totient is φ = 63100477440.

The previous prime is 123705038447. The next prime is 123705038521. The reversal of 123705038505 is 505830507321.

It is not a de Polignac number, because 123705038505 - 2⁷ = 123705038377 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4706841 + ... + 4733049.

It is an arithmetic number, because the mean of its divisors is an integer number (6454893960).

Almost surely, 2^123705038505 is an apocalyptic number.

123705038505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123705038505 is a deficient number, since it is larger than the sum of its proper divisors (82851568215).

123705038505 is a wasteful number, since it uses less digits than its factorization.

123705038505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39921.

The product of its (nonzero) digits is 126000, while the sum is 39.

The spelling of 123705038505 in words is "one hundred twenty-three billion, seven hundred five million, thirty-eight thousand, five hundred five".