6544163984 has 30 divisors (see below), whose sum is σ = 13101552630. Its totient is φ = 3166523520.

The previous prime is 6544163981. The next prime is 6544163993. The reversal of 6544163984 is 4893614456.

It can be written as a sum of positive squares in only one way, i.e., 5910534400 + 633629584 = 76880^2 + 25172^2 .

It is not an unprimeable number, because it can be changed into a prime (6544163981) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 197429 + ... + 228180.

It is an arithmetic number, because the mean of its divisors is an integer number (436718421).

Almost surely, 2^6544163984 is an apocalyptic number.

It is an amenable number.

6544163984 is an abundant number, since it is smaller than the sum of its proper divisors (6557388646).

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

6544163984 is a wasteful number, since it uses less digits than its factorization.

6544163984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425679 (or 425642 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 50.

The square root of 6544163984 is about 80896.0072191452. The cubic root of 6544163984 is about 1870.4727739783.

The spelling of 6544163984 in words is "six billion, five hundred forty-four million, one hundred sixty-three thousand, nine hundred eighty-four".