645296176 has 40 divisors (see below), whose sum is σ = 1434908160. Its totient is φ = 275386944.

The previous prime is 645296161. The next prime is 645296177. The reversal of 645296176 is 671692546.

It is not an unprimeable number, because it can be changed into a prime (645296177) 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 7 ways as a sum of consecutive naturals, for example, 14715 + ... + 38821.

It is an arithmetic number, because the mean of its divisors is an integer number (35872704).

Almost surely, 2^645296176 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645296176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (717454080).

645296176 is an abundant number, since it is smaller than the sum of its proper divisors (789611984).

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

645296176 is a wasteful number, since it uses less digits than its factorization.

645296176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24361 (or 24355 counting only the distinct ones).

The product of its digits is 544320, while the sum is 46.

The square root of 645296176 is about 25402.6804884839. The cubic root of 645296176 is about 864.1444874386.

The spelling of 645296176 in words is "six hundred forty-five million, two hundred ninety-six thousand, one hundred seventy-six".