645189152 has 24 divisors (see below), whose sum is σ = 1270950912. Its totient is φ = 322408000.

The previous prime is 645189133. The next prime is 645189179. The reversal of 645189152 is 251981546.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 62777 + ... + 72327.

It is an arithmetic number, because the mean of its divisors is an integer number (52956288).

Almost surely, 2^645189152 is an apocalyptic number.

It is an amenable number.

645189152 is a deficient number, since it is larger than the sum of its proper divisors (625761760).

645189152 is a wasteful number, since it uses less digits than its factorization.

645189152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11672 (or 11664 counting only the distinct ones).

The product of its digits is 86400, while the sum is 41.

The square root of 645189152 is about 25400.5738517853. The cubic root of 645189152 is about 864.0967112822.

The spelling of 645189152 in words is "six hundred forty-five million, one hundred eighty-nine thousand, one hundred fifty-two".