618182161 has 4 divisors (see below), whose sum is σ = 626889024. Its totient is φ = 609475300.

The previous prime is 618182153. The next prime is 618182167. The reversal of 618182161 is 161281816.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 618182161 - 2³ = 618182153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (618182167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4353325 + ... + 4353466.

It is an arithmetic number, because the mean of its divisors is an integer number (156722256).

Almost surely, 2^618182161 is an apocalyptic number.

It is an amenable number.

618182161 is a deficient number, since it is larger than the sum of its proper divisors (8706863).

618182161 is an equidigital number, since it uses as much as digits as its factorization.

618182161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8706862.

The product of its digits is 4608, while the sum is 34.

The square root of 618182161 is about 24863.2693143923. The cubic root of 618182161 is about 851.8677089854.

The spelling of 618182161 in words is "six hundred eighteen million, one hundred eighty-two thousand, one hundred sixty-one".