71016500720 has 80 divisors (see below), whose sum is σ = 180278068608. Its totient is φ = 25802046720.

The previous prime is 71016500717. The next prime is 71016500729. The reversal of 71016500720 is 2700561017.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71016500729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1010567 + ... + 1078553.

Almost surely, 2^71016500720 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 71016500720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90139034304).

71016500720 is an abundant number, since it is smaller than the sum of its proper divisors (109261567888).

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

71016500720 is a wasteful number, since it uses less digits than its factorization.

71016500720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69198 (or 69192 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 29.

The spelling of 71016500720 in words is "seventy-one billion, sixteen million, five hundred thousand, seven hundred twenty".