6544879680 has 112 divisors (see below), whose sum is σ = 21341730240. Its totient is φ = 1698121728.

The previous prime is 6544879661. The next prime is 6544879697. The reversal of 6544879680 is 869784456.

It is a self number, because there is not a number n which added to its sum of digits gives 6544879680.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56610 + ... + 127649.

Almost surely, 2^6544879680 is an apocalyptic number.

6544879680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6544879680 is an abundant number, since it is smaller than the sum of its proper divisors (14796850560).

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

6544879680 is a wasteful number, since it uses less digits than its factorization.

6544879680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184316 (or 184306 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 57.

The square root of 6544879680 is about 80900.4306539835. The cubic root of 6544879680 is about 1870.5409589589.

The spelling of 6544879680 in words is "six billion, five hundred forty-four million, eight hundred seventy-nine thousand, six hundred eighty".