635161161 has 16 divisors (see below), whose sum is σ = 876778560. Its totient is φ = 408515520.

The previous prime is 635161159. The next prime is 635161183. The reversal of 635161161 is 161161536.

It is not a de Polignac number, because 635161161 - 2¹ = 635161159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (635161061) 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, 159946 + ... + 163868.

It is an arithmetic number, because the mean of its divisors is an integer number (54798660).

Almost surely, 2^635161161 is an apocalyptic number.

It is an amenable number.

635161161 is a deficient number, since it is larger than the sum of its proper divisors (241617399).

635161161 is a wasteful number, since it uses less digits than its factorization.

635161161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5816.

The product of its digits is 3240, while the sum is 30.

The square root of 635161161 is about 25202.4038734403. The cubic root of 635161161 is about 859.5965120945.

The spelling of 635161161 in words is "six hundred thirty-five million, one hundred sixty-one thousand, one hundred sixty-one".