645341161 has 8 divisors (see below), whose sum is σ = 676886400. Its totient is φ = 614538288.

The previous prime is 645341159. The next prime is 645341219. The reversal of 645341161 is 161143546.

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

It is a cyclic number.

It is not a de Polignac number, because 645341161 - 2¹ = 645341159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645341111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183811 + ... + 187288.

It is an arithmetic number, because the mean of its divisors is an integer number (84610800).

Almost surely, 2^645341161 is an apocalyptic number.

It is an amenable number.

645341161 is a deficient number, since it is larger than the sum of its proper divisors (31545239).

645341161 is a wasteful number, since it uses less digits than its factorization.

645341161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371183.

The product of its digits is 8640, while the sum is 31.

The square root of 645341161 is about 25403.5659111078. The cubic root of 645341161 is about 864.1645674359.

The spelling of 645341161 in words is "six hundred forty-five million, three hundred forty-one thousand, one hundred sixty-one".