71215593478721 has 8 divisors (see below), whose sum is σ = 77381969145600. Its totient is φ = 65291036465520.

The previous prime is 71215593478717. The next prime is 71215593478763. The reversal of 71215593478721 is 12787439551217.

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 71215593478721 - 2² = 71215593478717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71215593478781) 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, 60454662806 + ... + 60454663983.

It is an arithmetic number, because the mean of its divisors is an integer number (9672746143200).

Almost surely, 2^{71215593478721} is an apocalyptic number.

It is an amenable number.

71215593478721 is a deficient number, since it is larger than the sum of its proper divisors (6166375666879).

71215593478721 is a wasteful number, since it uses less digits than its factorization.

71215593478721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120909326839.

The product of its digits is 29635200, while the sum is 62.

The spelling of 71215593478721 in words is "seventy-one trillion, two hundred fifteen billion, five hundred ninety-three million, four hundred seventy-eight thousand, seven hundred twenty-one".