6571920816 has 60 divisors (see below), whose sum is σ = 18537123072. Its totient is φ = 2173385088.

The previous prime is 6571920769. The next prime is 6571920833. The reversal of 6571920816 is 6180291756.

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, 161391 + ... + 197966.

Almost surely, 2^6571920816 is an apocalyptic number.

It is an amenable number.

6571920816 is an abundant number, since it is smaller than the sum of its proper divisors (11965202256).

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

6571920816 is a wasteful number, since it uses less digits than its factorization.

6571920816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359498 (or 359489 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 6571920816 is about 81067.3844156822. The cubic root of 6571920816 is about 1873.1135578290.

The spelling of 6571920816 in words is "six billion, five hundred seventy-one million, nine hundred twenty thousand, eight hundred sixteen".