71950338721 has 8 divisors (see below), whose sum is σ = 72466266600. Its totient is φ = 71436181632.

The previous prime is 71950338703. The next prime is 71950338749. The reversal of 71950338721 is 12783305917.

It can be written as a sum of positive squares in 4 ways, for example, as 938748321 + 71011590400 = 30639^2 + 266480^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71950338721 - 2¹¹ = 71950336673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71950308721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361090 + ... + 523723.

It is an arithmetic number, because the mean of its divisors is an integer number (9058283325).

Almost surely, 2^71950338721 is an apocalyptic number.

It is an amenable number.

71950338721 is a deficient number, since it is larger than the sum of its proper divisors (515927879).

71950338721 is a wasteful number, since it uses less digits than its factorization.

71950338721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885395.

The product of its (nonzero) digits is 317520, while the sum is 46.

The spelling of 71950338721 in words is "seventy-one billion, nine hundred fifty million, three hundred thirty-eight thousand, seven hundred twenty-one".