645300756844 has 24 divisors (see below), whose sum is σ = 1170167292000. Its totient is φ = 311004395520.

The previous prime is 645300756827. The next prime is 645300756847. The reversal of 645300756844 is 448657003546.

645300756844 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 645300756791 and 645300756800.

It is not an unprimeable number, because it can be changed into a prime (645300756847) 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, 4574037 + ... + 4713004.

It is an arithmetic number, because the mean of its divisors is an integer number (48756970500).

Almost surely, 2^645300756844 is an apocalyptic number.

It is an amenable number.

645300756844 is a deficient number, since it is larger than the sum of its proper divisors (524866535156).

645300756844 is a wasteful number, since it uses less digits than its factorization.

645300756844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9287673 (or 9287671 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 52.

The spelling of 645300756844 in words is "six hundred forty-five billion, three hundred million, seven hundred fifty-six thousand, eight hundred forty-four".