6551943552 has 640 divisors, whose sum is σ = 25236921600. Its totient is φ = 1637314560.

The previous prime is 6551943547. The next prime is 6551943577. The reversal of 6551943552 is 2553491556.

6551943552 is a `hidden beast` number, since 6 + 5 + 5 + 1 + 94 + 3 + 552 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 6551943498 and 6551943507.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 23151603 + ... + 23151885.

It is an arithmetic number, because the mean of its divisors is an integer number (39432690).

Almost surely, 2^6551943552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6551943552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12618460800).

6551943552 is an abundant number, since it is smaller than the sum of its proper divisors (18684978048).

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

6551943552 is a wasteful number, since it uses less digits than its factorization.

6551943552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356 (or 335 counting only the distinct ones).

The product of its digits is 810000, while the sum is 45.

The square root of 6551943552 is about 80944.0766949627. The cubic root of 6551943552 is about 1871.2136736977.

The spelling of 6551943552 in words is "six billion, five hundred fifty-one million, nine hundred forty-three thousand, five hundred fifty-two".