645436160 has 36 divisors (see below), whose sum is σ = 1546024368. Its totient is φ = 258173952.

The previous prime is 645436159. The next prime is 645436171. The reversal of 645436160 is 61634546.

It is a self number, because there is not a number n which added to its sum of digits gives 645436160.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250844 + ... + 253403.

Almost surely, 2^645436160 is an apocalyptic number.

It is an amenable number.

645436160 is an abundant number, since it is smaller than the sum of its proper divisors (900588208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645436160 is an equidigital number, since it uses as much as digits as its factorization.

645436160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504268 (or 504254 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 645436160 is about 25405.4356388549. The cubic root of 645436160 is about 864.2069691642.

The spelling of 645436160 in words is "six hundred forty-five million, four hundred thirty-six thousand, one hundred sixty".