6570991616 has 224 divisors, whose sum is σ = 16335816960. Its totient is φ = 2579890176.

The previous prime is 6570991591. The next prime is 6570991621. The reversal of 6570991616 is 6161990756.

It is a tau number, because it is divible by the number of its divisors (224).

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 15 ways as a sum of consecutive naturals, for example, 40312751 + ... + 40312913.

Almost surely, 2^6570991616 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 6570991616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8167908480).

6570991616 is an abundant number, since it is smaller than the sum of its proper divisors (9764825344).

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

6570991616 is a wasteful number, since it uses less digits than its factorization.

6570991616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 50.

The square root of 6570991616 is about 81061.6531783062. The cubic root of 6570991616 is about 1873.0252741951.

The spelling of 6570991616 in words is "six billion, five hundred seventy million, nine hundred ninety-one thousand, six hundred sixteen".