138623665835 has 8 divisors (see below), whose sum is σ = 166350399840. Its totient is φ = 110897598784.

The previous prime is 138623665823. The next prime is 138623665837. The reversal of 138623665835 is 538566326831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138623665835 - 2¹² = 138623661739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138623665837) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 702314 + ... + 877776.

It is an arithmetic number, because the mean of its divisors is an integer number (20793799980).

Almost surely, 2^138623665835 is an apocalyptic number.

138623665835 is a deficient number, since it is larger than the sum of its proper divisors (27726734005).

138623665835 is a wasteful number, since it uses less digits than its factorization.

138623665835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333477.

The product of its digits is 18662400, while the sum is 56.

The spelling of 138623665835 in words is "one hundred thirty-eight billion, six hundred twenty-three million, six hundred sixty-five thousand, eight hundred thirty-five".