6556895136 has 288 divisors, whose sum is σ = 22133966400. Its totient is φ = 1881792000.

The previous prime is 6556895089. The next prime is 6556895143. The reversal of 6556895136 is 6315986556.

It is a happy number.

6556895136 is a `hidden beast` number, since 6 + 556 + 8 + 9 + 51 + 36 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1984686 + ... + 1987986.

It is an arithmetic number, because the mean of its divisors is an integer number (76854050).

Almost surely, 2^6556895136 is an apocalyptic number.

6556895136 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6556895136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11066983200).

6556895136 is an abundant number, since it is smaller than the sum of its proper divisors (15577071264).

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

6556895136 is a wasteful number, since it uses less digits than its factorization.

6556895136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3361 (or 3336 counting only the distinct ones).

The product of its digits is 5832000, while the sum is 54.

The square root of 6556895136 is about 80974.6573688336. The cubic root of 6556895136 is about 1871.6849404035.

The spelling of 6556895136 in words is "six billion, five hundred fifty-six million, eight hundred ninety-five thousand, one hundred thirty-six".