645080352 has 48 divisors (see below), whose sum is σ = 1935243072. Its totient is φ = 184308480.

The previous prime is 645080339. The next prime is 645080353. The reversal of 645080352 is 253080546.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×645080352² = 832257321072887808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (645080353) 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, 479299 + ... + 480642.

It is an arithmetic number, because the mean of its divisors is an integer number (40317564).

Almost surely, 2^645080352 is an apocalyptic number.

It is an amenable number.

645080352 is an abundant number, since it is smaller than the sum of its proper divisors (1290162720).

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

645080352 is a wasteful number, since it uses less digits than its factorization.

645080352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959961 (or 959953 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 645080352 is about 25398.4320775909. The cubic root of 645080352 is about 864.0481368928.

The spelling of 645080352 in words is "six hundred forty-five million, eighty thousand, three hundred fifty-two".