71225138686 has 16 divisors (see below), whose sum is σ = 116512401600. Its totient is φ = 32457024288.

The previous prime is 71225138659. The next prime is 71225138687. The reversal of 71225138686 is 68683152217.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71225138687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17336101 + ... + 17340208.

It is an arithmetic number, because the mean of its divisors is an integer number (7282025100).

Almost surely, 2^71225138686 is an apocalyptic number.

71225138686 is a deficient number, since it is larger than the sum of its proper divisors (45287262914).

71225138686 is a wasteful number, since it uses less digits than its factorization.

71225138686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34676403.

The product of its digits is 967680, while the sum is 49.

The spelling of 71225138686 in words is "seventy-one billion, two hundred twenty-five million, one hundred thirty-eight thousand, six hundred eighty-six".