643125446466 has 16 divisors (see below), whose sum is σ = 1307336973888. Its totient is φ = 210860802000.

The previous prime is 643125446461. The next prime is 643125446501. The reversal of 643125446466 is 664644521346.

It is a super-2 number, since 2×643125446466² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (643125446461) 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 7 ways as a sum of consecutive naturals, for example, 878586310 + ... + 878587041.

It is an arithmetic number, because the mean of its divisors is an integer number (81708560868).

Almost surely, 2^643125446466 is an apocalyptic number.

643125446466 is an abundant number, since it is smaller than the sum of its proper divisors (664211527422).

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

643125446466 is a wasteful number, since it uses less digits than its factorization.

643125446466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1757173417.

The product of its digits is 9953280, while the sum is 51.

The spelling of 643125446466 in words is "six hundred forty-three billion, one hundred twenty-five million, four hundred forty-six thousand, four hundred sixty-six".