729641663771 has 2 divisors, whose sum is σ = 729641663772. Its totient is φ = 729641663770.

The previous prime is 729641663767. The next prime is 729641663797. The reversal of 729641663771 is 177366146927.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 729641663771 - 2² = 729641663767 is a prime.

It is a super-3 number, since 3×729641663771³ (a number of 37 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 729641663771.

It is not a weakly prime, because it can be changed into another prime (729641663711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364820831885 + 364820831886.

It is an arithmetic number, because the mean of its divisors is an integer number (364820831886).

Almost surely, 2^729641663771 is an apocalyptic number.

729641663771 is a deficient number, since it is larger than the sum of its proper divisors (1).

729641663771 is an equidigital number, since it uses as much as digits as its factorization.

729641663771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16003008, while the sum is 59.

The spelling of 729641663771 in words is "seven hundred twenty-nine billion, six hundred forty-one million, six hundred sixty-three thousand, seven hundred seventy-one".