727606865721 has 8 divisors (see below), whose sum is σ = 990783817344. Its totient is φ = 474750578960.

The previous prime is 727606865707. The next prime is 727606865723. The reversal of 727606865721 is 127568606727.

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 727606865721 - 2¹¹ = 727606863673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (727606865723) 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, 2580166050 + ... + 2580166331.

It is an arithmetic number, because the mean of its divisors is an integer number (123847977168).

Almost surely, 2^727606865721 is an apocalyptic number.

It is an amenable number.

727606865721 is a deficient number, since it is larger than the sum of its proper divisors (263176951623).

727606865721 is a wasteful number, since it uses less digits than its factorization.

727606865721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5160332431.

The product of its (nonzero) digits is 11854080, while the sum is 57.

The spelling of 727606865721 in words is "seven hundred twenty-seven billion, six hundred six million, eight hundred sixty-five thousand, seven hundred twenty-one".