2656505856 has 104 divisors (see below), whose sum is σ = 7218564480. Its totient is φ = 868581376.

The previous prime is 2656505801. The next prime is 2656505921. The reversal of 2656505856 is 6585056562.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649225 + ... + 653303.

Almost surely, 2^2656505856 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 2656505856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3609282240).

2656505856 is an abundant number, since it is smaller than the sum of its proper divisors (4562058624).

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

2656505856 is an equidigital number, since it uses as much as digits as its factorization.

2656505856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4159 (or 4137 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 48.

The square root of 2656505856 is about 51541.3024282468. The cubic root of 2656505856 is about 1384.9590287940.

The spelling of 2656505856 in words is "two billion, six hundred fifty-six million, five hundred five thousand, eight hundred fifty-six".