725711161 has 16 divisors (see below), whose sum is σ = 851406336. Its totient is φ = 605658816.

The previous prime is 725711153. The next prime is 725711179. The reversal of 725711161 is 161117527.

It is a happy number.

725711161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 725711161 - 2³ = 725711153 is a prime.

It is a super-3 number, since 3×725711161³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725711141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59215 + ... + 70411.

It is an arithmetic number, because the mean of its divisors is an integer number (53212896).

Almost surely, 2^725711161 is an apocalyptic number.

It is an amenable number.

725711161 is a deficient number, since it is larger than the sum of its proper divisors (125695175).

725711161 is a wasteful number, since it uses less digits than its factorization.

725711161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11448.

The product of its digits is 2940, while the sum is 31.

The square root of 725711161 is about 26939.0267270367. The cubic root of 725711161 is about 898.6445278880.

Adding to 725711161 its reverse (161117527), we get a palindrome (886828688).

The spelling of 725711161 in words is "seven hundred twenty-five million, seven hundred eleven thousand, one hundred sixty-one".