6561627520271 has 8 divisors (see below), whose sum is σ = 6580811036160. Its totient is φ = 6542454689152.

The previous prime is 6561627520243. The next prime is 6561627520277. The reversal of 6561627520271 is 1720257261656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6561627520271 - 2²² = 6561623325967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6561627520277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1440350 + ... + 3898443.

It is an arithmetic number, because the mean of its divisors is an integer number (822601379520).

Almost surely, 2^{6561627520271} is an apocalyptic number.

6561627520271 is a deficient number, since it is larger than the sum of its proper divisors (19183515889).

6561627520271 is a wasteful number, since it uses less digits than its factorization.

6561627520271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5342385.

The product of its (nonzero) digits is 2116800, while the sum is 50.

The spelling of 6561627520271 in words is "six trillion, five hundred sixty-one billion, six hundred twenty-seven million, five hundred twenty thousand, two hundred seventy-one".