123665479042 has 64 divisors (see below), whose sum is σ = 215706240000. Its totient is φ = 52083352512.

The previous prime is 123665479033. The next prime is 123665479109. The reversal of 123665479042 is 240974566321.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84759709 + ... + 84761167.

It is an arithmetic number, because the mean of its divisors is an integer number (3370410000).

Almost surely, 2^123665479042 is an apocalyptic number.

123665479042 is a deficient number, since it is larger than the sum of its proper divisors (92040760958).

123665479042 is a wasteful number, since it uses less digits than its factorization.

123665479042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023.

The product of its (nonzero) digits is 2177280, while the sum is 49.

The spelling of 123665479042 in words is "one hundred twenty-three billion, six hundred sixty-five million, four hundred seventy-nine thousand, forty-two".