645482970568 has 32 divisors (see below), whose sum is σ = 1285103876760. Its totient is φ = 302896168960.

The previous prime is 645482970557. The next prime is 645482970577. The reversal of 645482970568 is 865079284546.

It can be written as a sum of positive squares in 4 ways, for example, as 592287238404 + 53195732164 = 769602^2 + 230642^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6674653 + ... + 6770668.

Almost surely, 2^645482970568 is an apocalyptic number.

645482970568 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

645482970568 is a deficient number, since it is larger than the sum of its proper divisors (639620906192).

645482970568 is a wasteful number, since it uses less digits than its factorization.

645482970568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13445697 (or 13445693 counting only the distinct ones).

The product of its (nonzero) digits is 116121600, while the sum is 64.

The spelling of 645482970568 in words is "six hundred forty-five billion, four hundred eighty-two million, nine hundred seventy thousand, five hundred sixty-eight".