71327720621 has 8 divisors (see below), whose sum is σ = 77111050080. Its totient is φ = 65747315088.

The previous prime is 71327720579. The next prime is 71327720657. The reversal of 71327720621 is 12602772317.

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 71327720621 - 2¹⁰ = 71327719597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71327740621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50730251 + ... + 50731656.

It is an arithmetic number, because the mean of its divisors is an integer number (9638881260).

Almost surely, 2^71327720621 is an apocalyptic number.

It is an amenable number.

71327720621 is a deficient number, since it is larger than the sum of its proper divisors (5783329459).

71327720621 is a wasteful number, since it uses less digits than its factorization.

71327720621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101461963.

The product of its (nonzero) digits is 49392, while the sum is 38.

The spelling of 71327720621 in words is "seventy-one billion, three hundred twenty-seven million, seven hundred twenty thousand, six hundred twenty-one".