138669762838 has 4 divisors (see below), whose sum is σ = 208004644260. Its totient is φ = 69334881418.

The previous prime is 138669762797. The next prime is 138669762839. The reversal of 138669762838 is 838267966831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 838267966831 = 174481 ⋅4804351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138669762839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34667440708 + ... + 34667440711.

It is an arithmetic number, because the mean of its divisors is an integer number (52001161065).

Almost surely, 2^138669762838 is an apocalyptic number.

138669762838 is a deficient number, since it is larger than the sum of its proper divisors (69334881422).

138669762838 is an equidigital number, since it uses as much as digits as its factorization.

138669762838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69334881421.

The product of its digits is 125411328, while the sum is 67.

The spelling of 138669762838 in words is "one hundred thirty-eight billion, six hundred sixty-nine million, seven hundred sixty-two thousand, eight hundred thirty-eight".