646118169 has 8 divisors (see below), whose sum is σ = 872396160. Its totient is φ = 425292816.

The previous prime is 646118147. The next prime is 646118183. The reversal of 646118169 is 961811646.

646118169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 646118169 - 2¹⁹ = 645593881 is a prime.

It is a super-2 number, since 2×646118169² = 834937376623825122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 646118169.

It is not an unprimeable number, because it can be changed into a prime (646118119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1362882 + ... + 1363355.

It is an arithmetic number, because the mean of its divisors is an integer number (109049520).

Almost surely, 2^646118169 is an apocalyptic number.

It is an amenable number.

646118169 is a deficient number, since it is larger than the sum of its proper divisors (226277991).

646118169 is a wasteful number, since it uses less digits than its factorization.

646118169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2726319.

The product of its digits is 62208, while the sum is 42.

The square root of 646118169 is about 25418.8545965392. The cubic root of 646118169 is about 864.5112540757.

The spelling of 646118169 in words is "six hundred forty-six million, one hundred eighteen thousand, one hundred sixty-nine".