71133513709 has 6 divisors (see below), whose sum is σ = 72910795370. Its totient is φ = 69398548320.

The previous prime is 71133513697. The next prime is 71133513713. The reversal of 71133513709 is 90731533117.

It can be written as a sum of positive squares in 3 ways, for example, as 166152100 + 70967361609 = 12890^2 + 266397^2 .

It is not a de Polignac number, because 71133513709 - 2⁵ = 71133513677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71133513719) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21156414 + ... + 21159775.

Almost surely, 2^71133513709 is an apocalyptic number.

It is an amenable number.

71133513709 is a deficient number, since it is larger than the sum of its proper divisors (1777281661).

71133513709 is an equidigital number, since it uses as much as digits as its factorization.

71133513709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42316271 (or 42316230 counting only the distinct ones).

The product of its (nonzero) digits is 59535, while the sum is 40.

The spelling of 71133513709 in words is "seventy-one billion, one hundred thirty-three million, five hundred thirteen thousand, seven hundred nine".