138228970835 has 4 divisors (see below), whose sum is σ = 165874765008. Its totient is φ = 110583176664.

The previous prime is 138228970807. The next prime is 138228970837. The reversal of 138228970835 is 538079822831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138228970835 - 2¹⁶ = 138228905299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138228970837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13822897079 + ... + 13822897088.

It is an arithmetic number, because the mean of its divisors is an integer number (41468691252).

Almost surely, 2^138228970835 is an apocalyptic number.

138228970835 is a deficient number, since it is larger than the sum of its proper divisors (27645794173).

138228970835 is an equidigital number, since it uses as much as digits as its factorization.

138228970835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27645794172.

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 138228970835 in words is "one hundred thirty-eight billion, two hundred twenty-eight million, nine hundred seventy thousand, eight hundred thirty-five".