71710221712 has 80 divisors (see below), whose sum is σ = 148089740400. Its totient is φ = 33522384896.

The previous prime is 71710221707. The next prime is 71710221719. The reversal of 71710221712 is 21712201717.

It can be written as a sum of positive squares in 8 ways, for example, as 24874336656 + 46835885056 = 157716^2 + 216416^2 .

It is not an unprimeable number, because it can be changed into a prime (71710221719) 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 15 ways as a sum of consecutive naturals, for example, 28131414 + ... + 28133962.

It is an arithmetic number, because the mean of its divisors is an integer number (1851121755).

Almost surely, 2^71710221712 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 71710221712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74044870200).

71710221712 is an abundant number, since it is smaller than the sum of its proper divisors (76379518688).

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

71710221712 is a wasteful number, since it uses less digits than its factorization.

71710221712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3220 (or 3214 counting only the distinct ones).

The product of its (nonzero) digits is 2744, while the sum is 31.

The spelling of 71710221712 in words is "seventy-one billion, seven hundred ten million, two hundred twenty-one thousand, seven hundred twelve".