138235795685 has 32 divisors (see below), whose sum is σ = 182587063680. Its totient is φ = 99846892800.

The previous prime is 138235795657. The next prime is 138235795717. The reversal of 138235795685 is 586597532831.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-138235795685 is a prime.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 31 ways as a sum of consecutive naturals, for example, 612350 + ... + 807120.

It is an arithmetic number, because the mean of its divisors is an integer number (5705845740).

Almost surely, 2^138235795685 is an apocalyptic number.

It is an amenable number.

138235795685 is a deficient number, since it is larger than the sum of its proper divisors (44351267995).

138235795685 is a wasteful number, since it uses less digits than its factorization.

138235795685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195029.

The product of its digits is 54432000, while the sum is 62.

The spelling of 138235795685 in words is "one hundred thirty-eight billion, two hundred thirty-five million, seven hundred ninety-five thousand, six hundred eighty-five".