405645164 has 6 divisors (see below), whose sum is σ = 709879044. Its totient is φ = 202822580.

The previous prime is 405645161. The next prime is 405645167. The reversal of 405645164 is 461546504.

It is an interprime number because it is at equal distance from previous prime (405645161) and next prime (405645167).

It is not an unprimeable number, because it can be changed into a prime (405645161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50705642 + ... + 50705649.

It is an arithmetic number, because the mean of its divisors is an integer number (118313174).

Almost surely, 2^405645164 is an apocalyptic number.

It is an amenable number.

405645164 is a deficient number, since it is larger than the sum of its proper divisors (304233880).

405645164 is a wasteful number, since it uses less digits than its factorization.

405645164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101411295 (or 101411293 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 405645164 is about 20140.6346473988. The cubic root of 405645164 is about 740.2562808460.

The spelling of 405645164 in words is "four hundred five million, six hundred forty-five thousand, one hundred sixty-four".