645622704552 has 64 divisors (see below), whose sum is σ = 1858717555200. Its totient is φ = 183055504320.

The previous prime is 645622704527. The next prime is 645622704563. The reversal of 645622704552 is 255407226546.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14645902 + ... + 14689917.

It is an arithmetic number, because the mean of its divisors is an integer number (29042461800).

Almost surely, 2^645622704552 is an apocalyptic number.

It is an amenable number.

645622704552 is an abundant number, since it is smaller than the sum of its proper divisors (1213094850648).

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

645622704552 is a wasteful number, since it uses less digits than its factorization.

645622704552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29335966 (or 29335962 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 48.

The spelling of 645622704552 in words is "six hundred forty-five billion, six hundred twenty-two million, seven hundred four thousand, five hundred fifty-two".