71130028132 has 6 divisors (see below), whose sum is σ = 124477549238. Its totient is φ = 35565014064.

The previous prime is 71130028121. The next prime is 71130028133. The reversal of 71130028132 is 23182003117.

It can be written as a sum of positive squares in only one way, i.e., 50022006336 + 21108021796 = 223656^2 + 145286^2 .

It is a super-2 number, since 2×71130028132² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71130028132.

It is not an unprimeable number, because it can be changed into a prime (71130028133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8891253513 + ... + 8891253520.

Almost surely, 2^71130028132 is an apocalyptic number.

It is an amenable number.

71130028132 is a deficient number, since it is larger than the sum of its proper divisors (53347521106).

71130028132 is a wasteful number, since it uses less digits than its factorization.

71130028132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17782507037 (or 17782507035 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The spelling of 71130028132 in words is "seventy-one billion, one hundred thirty million, twenty-eight thousand, one hundred thirty-two".