643125652624 has 80 divisors (see below), whose sum is σ = 1533795303040. Its totient is φ = 254392151040.

The previous prime is 643125652577. The next prime is 643125652627. The reversal of 643125652624 is 426256521346.

It is a super-2 number, since 2×643125652624² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (643125652627) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 14551039 + ... + 14595169.

It is an arithmetic number, because the mean of its divisors is an integer number (19172441288).

Almost surely, 2^643125652624 is an apocalyptic number.

It is an amenable number.

643125652624 is an abundant number, since it is smaller than the sum of its proper divisors (890669650416).

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

643125652624 is a wasteful number, since it uses less digits than its factorization.

643125652624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54168 (or 54162 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 46.

The spelling of 643125652624 in words is "six hundred forty-three billion, one hundred twenty-five million, six hundred fifty-two thousand, six hundred twenty-four".