655005161 has 4 divisors (see below), whose sum is σ = 658791492. Its totient is φ = 651218832.

The previous prime is 655005157. The next prime is 655005179. The reversal of 655005161 is 161500556.

655005161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 318979600 + 336025561 = 17860^2 + 18331^2 .

It is a cyclic number.

It is not a de Polignac number, because 655005161 - 2² = 655005157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (655005151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1892906 + ... + 1893251.

It is an arithmetic number, because the mean of its divisors is an integer number (164697873).

Almost surely, 2^655005161 is an apocalyptic number.

It is an amenable number.

655005161 is a deficient number, since it is larger than the sum of its proper divisors (3786331).

655005161 is a wasteful number, since it uses less digits than its factorization.

655005161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3786330.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 655005161 is about 25593.0686124193. The cubic root of 655005161 is about 868.4568412296.

The spelling of 655005161 in words is "six hundred fifty-five million, five thousand, one hundred sixty-one".