71718544680 has 128 divisors (see below), whose sum is σ = 220620516480. Its totient is φ = 18645073920.

The previous prime is 71718544663. The next prime is 71718544687. The reversal of 71718544680 is 8644581717.

It is not an unprimeable number, because it can be changed into a prime (71718544687) 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 31 ways as a sum of consecutive naturals, for example, 733900 + ... + 825860.

It is an arithmetic number, because the mean of its divisors is an integer number (1723597785).

Almost surely, 2^71718544680 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 71718544680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110310258240).

71718544680 is an abundant number, since it is smaller than the sum of its proper divisors (148901971800).

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

71718544680 is a wasteful number, since it uses less digits than its factorization.

71718544680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92139 (or 92135 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 51.

The spelling of 71718544680 in words is "seventy-one billion, seven hundred eighteen million, five hundred forty-four thousand, six hundred eighty".