6433544660 has 48 divisors (see below), whose sum is σ = 13628227536. Its totient is φ = 2551037952.

The previous prime is 6433544653. The next prime is 6433544671. The reversal of 6433544660 is 664453346.

It can be written as a sum of positive squares in 8 ways, for example, as 1458781636 + 4974763024 = 38194^2 + 70532^2 .

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 2829284 + ... + 2831556.

It is an arithmetic number, because the mean of its divisors is an integer number (283921407).

Almost surely, 2^6433544660 is an apocalyptic number.

It is an amenable number.

6433544660 is an abundant number, since it is smaller than the sum of its proper divisors (7194682876).

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

6433544660 is a wasteful number, since it uses less digits than its factorization.

6433544660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3452 (or 3450 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 41.

The square root of 6433544660 is about 80209.3801247709. The cubic root of 6433544660 is about 1859.8736434763.

The spelling of 6433544660 in words is "six billion, four hundred thirty-three million, five hundred forty-four thousand, six hundred sixty".