6571987968 has 176 divisors, whose sum is σ = 21559986560. Its totient is φ = 1733197824.

The previous prime is 6571987967. The next prime is 6571987973. The reversal of 6571987968 is 8697891756.

It is a junction number, because it is equal to n+sod(n) for n = 6571987899 and 6571987908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6571987967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267798 + ... + 291306.

Almost surely, 2^6571987968 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 6571987968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10779993280).

6571987968 is an abundant number, since it is smaller than the sum of its proper divisors (14987998592).

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

6571987968 is a wasteful number, since it uses less digits than its factorization.

6571987968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23552 (or 23534 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 66.

The square root of 6571987968 is about 81067.7985885888. The cubic root of 6571987968 is about 1873.1199376428.

The spelling of 6571987968 in words is "six billion, five hundred seventy-one million, nine hundred eighty-seven thousand, nine hundred sixty-eight".