726787161 has 20 divisors (see below), whose sum is σ = 1110948432. Its totient is φ = 473254488.

The previous prime is 726787151. The next prime is 726787163. The reversal of 726787161 is 161787627.

726787161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-726787161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (726787163) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 100851 + ... + 107816.

Almost surely, 2^726787161 is an apocalyptic number.

It is an amenable number.

726787161 is a deficient number, since it is larger than the sum of its proper divisors (384161271).

726787161 is a wasteful number, since it uses less digits than its factorization.

726787161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208722 (or 208713 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 726787161 is about 26958.9903557236. The cubic root of 726787161 is about 899.0884437174.

The spelling of 726787161 in words is "seven hundred twenty-six million, seven hundred eighty-seven thousand, one hundred sixty-one".