6555255840 has 288 divisors, whose sum is σ = 25856288640. Its totient is φ = 1481306112.

The previous prime is 6555255827. The next prime is 6555255853. The reversal of 6555255840 is 485525556.

6555255840 is a `hidden beast` number, since 6 + 5 + 5 + 52 + 558 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (6555255827) and next prime (6555255853).

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 (45).

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, 893467 + ... + 900773.

It is an arithmetic number, because the mean of its divisors is an integer number (89778780).

Almost surely, 2^6555255840 is an apocalyptic number.

6555255840 is a gapful number since it is divisible by the number (60) 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 6555255840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12928144320).

6555255840 is an abundant number, since it is smaller than the sum of its proper divisors (19301032800).

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

6555255840 is a wasteful number, since it uses less digits than its factorization.

6555255840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7424 (or 7413 counting only the distinct ones).

The product of its (nonzero) digits is 1200000, while the sum is 45.

The square root of 6555255840 is about 80964.5344579959. The cubic root of 6555255840 is about 1871.5289467863.

The spelling of 6555255840 in words is "six billion, five hundred fifty-five million, two hundred fifty-five thousand, eight hundred forty".