645606848 has 28 divisors (see below), whose sum is σ = 1282720320. Its totient is φ = 322401792.

The previous prime is 645606839. The next prime is 645606853. The reversal of 645606848 is 848606546.

It is a happy number.

645606848 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49388 + ... + 61076.

It is an arithmetic number, because the mean of its divisors is an integer number (45811440).

Almost surely, 2^645606848 is an apocalyptic number.

It is an amenable number.

645606848 is a deficient number, since it is larger than the sum of its proper divisors (637113472).

645606848 is a wasteful number, since it uses less digits than its factorization.

645606848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12564 (or 12554 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 47.

The square root of 645606848 is about 25408.7946978994. The cubic root of 645606848 is about 864.2831433686.

The spelling of 645606848 in words is "six hundred forty-five million, six hundred six thousand, eight hundred forty-eight".