71573440716 has 144 divisors (see below), whose sum is σ = 189114639168. Its totient is φ = 22805452800.

The previous prime is 71573440711. The next prime is 71573440723. The reversal of 71573440716 is 61704437517.

71573440716 is a `hidden beast` number, since 7 + 1 + 573 + 4 + 4 + 0 + 71 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (71573440711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16914321 + ... + 16918551.

Almost surely, 2^71573440716 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71573440716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94557319584).

71573440716 is an abundant number, since it is smaller than the sum of its proper divisors (117541198452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71573440716 is a wasteful number, since it uses less digits than its factorization.

71573440716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4512 (or 4507 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 45.

The spelling of 71573440716 in words is "seventy-one billion, five hundred seventy-three million, four hundred forty thousand, seven hundred sixteen".