645026552 has 16 divisors (see below), whose sum is σ = 1211160600. Its totient is φ = 322050400.

The previous prime is 645026539. The next prime is 645026633. The reversal of 645026552 is 255620546.

645026552 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, 51902 + ... + 63117.

Almost surely, 2^645026552 is an apocalyptic number.

It is an amenable number.

645026552 is a deficient number, since it is larger than the sum of its proper divisors (566134048).

645026552 is a wasteful number, since it uses less digits than its factorization.

645026552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115726 (or 115722 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

The square root of 645026552 is about 25397.3729350104. The cubic root of 645026552 is about 864.0241155535.

The spelling of 645026552 in words is "six hundred forty-five million, twenty-six thousand, five hundred fifty-two".