6649759053216 has 72 divisors (see below), whose sum is σ = 20022620105124. Its totient is φ = 2086198917120.

The previous prime is 6649759053187. The next prime is 6649759053227. The reversal of 6649759053216 is 6123509579466.

6649759053216 is a `hidden beast` number, since 6 + 6 + 4 + 9 + 7 + 5 + 90 + 532 + 1 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6392503155600 + 257255897616 = 2528340^2 + 507204^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 679096315 + ... + 679106106.

Almost surely, 2^{6649759053216} is an apocalyptic number.

It is an amenable number.

6649759053216 is an abundant number, since it is smaller than the sum of its proper divisors (13372861051908).

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

6649759053216 is a wasteful number, since it uses less digits than its factorization.

6649759053216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358202454 (or 1358202443 counting only the distinct ones).

The product of its (nonzero) digits is 73483200, while the sum is 63.

The spelling of 6649759053216 in words is "six trillion, six hundred forty-nine billion, seven hundred fifty-nine million, fifty-three thousand, two hundred sixteen".