6500855556 has 288 divisors, whose sum is σ = 19833061248. Its totient is φ = 1843845120.

The previous prime is 6500855533. The next prime is 6500855623. The reversal of 6500855556 is 6555580056.

It is a super-2 number, since 2×6500855556² = 84522245919952138272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11384751 + ... + 11385321.

It is an arithmetic number, because the mean of its divisors is an integer number (68864796).

Almost surely, 2^6500855556 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 6500855556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9916530624).

6500855556 is an abundant number, since it is smaller than the sum of its proper divisors (13332205692).

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

6500855556 is a wasteful number, since it uses less digits than its factorization.

6500855556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673 (or 659 counting only the distinct ones).

The product of its (nonzero) digits is 900000, while the sum is 45.

The square root of 6500855556 is about 80627.8832414693. The cubic root of 6500855556 is about 1866.3374561578.

The spelling of 6500855556 in words is "six billion, five hundred million, eight hundred fifty-five thousand, five hundred fifty-six".