728744187161 has 8 divisors (see below), whose sum is σ = 767851960800. Its totient is φ = 689711695200.

The previous prime is 728744187103. The next prime is 728744187163. The reversal of 728744187161 is 161781447827.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728744187161 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 728744187097 and 728744187106.

It is not an unprimeable number, because it can be changed into a prime (728744187163) 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, 18800540 + ... + 18839261.

It is an arithmetic number, because the mean of its divisors is an integer number (95981495100).

Almost surely, 2^728744187161 is an apocalyptic number.

It is an amenable number.

728744187161 is a deficient number, since it is larger than the sum of its proper divisors (39107773639).

728744187161 is a wasteful number, since it uses less digits than its factorization.

728744187161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37640839.

The product of its digits is 4214784, while the sum is 56.

The spelling of 728744187161 in words is "seven hundred twenty-eight billion, seven hundred forty-four million, one hundred eighty-seven thousand, one hundred sixty-one".