71589739138 has 8 divisors (see below), whose sum is σ = 107392884732. Its totient is φ = 35792110896.

The previous prime is 71589739129. The next prime is 71589739139. The reversal of 71589739138 is 83193798517.

It can be written as a sum of positive squares in 2 ways, for example, as 65763012249 + 5826726889 = 256443^2 + 76333^2 .

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

It is not an unprimeable number, because it can be changed into a prime (71589739139) 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, 1346745 + ... + 1398892.

Almost surely, 2^71589739138 is an apocalyptic number.

71589739138 is a deficient number, since it is larger than the sum of its proper divisors (35803145594).

71589739138 is a wasteful number, since it uses less digits than its factorization.

71589739138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2758676.

The product of its digits is 11430720, while the sum is 61.

The spelling of 71589739138 in words is "seventy-one billion, five hundred eighty-nine million, seven hundred thirty-nine thousand, one hundred thirty-eight".