6721652544 has 56 divisors (see below), whose sum is σ = 17793004800. Its totient is φ = 2239463424.

The previous prime is 6721652527. The next prime is 6721652557. The reversal of 6721652544 is 4452561276.

It is a super-2 number, since 2×6721652544² = 90361225844523343872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6721652496 and 6721652505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 453312 + ... + 467904.

Almost surely, 2^6721652544 is an apocalyptic number.

6721652544 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

6721652544 is an abundant number, since it is smaller than the sum of its proper divisors (11071352256).

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

6721652544 is a wasteful number, since it uses less digits than its factorization.

6721652544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17007 (or 16997 counting only the distinct ones).

The product of its digits is 403200, while the sum is 42.

The square root of 6721652544 is about 81985.6849943940. The cubic root of 6721652544 is about 1887.2322658945.

The spelling of 6721652544 in words is "six billion, seven hundred twenty-one million, six hundred fifty-two thousand, five hundred forty-four".