6557582656 has 56 divisors (see below), whose sum is σ = 13356092160. Its totient is φ = 3193377792.

The previous prime is 6557582641. The next prime is 6557582657. The reversal of 6557582656 is 6562857556.

It is a junction number, because it is equal to n+sod(n) for n = 6557582597 and 6557582606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6557582657) 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, 373041 + ... + 390223.

Almost surely, 2^6557582656 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 6557582656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6678046080).

6557582656 is an abundant number, since it is smaller than the sum of its proper divisors (6798509504).

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

6557582656 is a wasteful number, since it uses less digits than its factorization.

6557582656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17351 (or 17341 counting only the distinct ones).

The product of its digits is 15120000, while the sum is 55.

The square root of 6557582656 is about 80978.9025364014. The cubic root of 6557582656 is about 1871.7503563171.

The spelling of 6557582656 in words is "six billion, five hundred fifty-seven million, five hundred eighty-two thousand, six hundred fifty-six".