2555043840 has 336 divisors, whose sum is σ = 9200692800. Its totient is φ = 655097856.

The previous prime is 2555043823. The next prime is 2555043847. The reversal of 2555043840 is 483405552.

2555043840 is a `hidden beast` number, since 25 + 550 + 4 + 3 + 84 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2555043795 and 2555043804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2555043847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10690441 + ... + 10690679.

Almost surely, 2^2555043840 is an apocalyptic number.

2555043840 is a gapful number since it is divisible by the number (20) 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 2555043840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4600346400).

2555043840 is an abundant number, since it is smaller than the sum of its proper divisors (6645648960).

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

2555043840 is a wasteful number, since it uses less digits than its factorization.

2555043840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The square root of 2555043840 is about 50547.4414782786. The cubic root of 2555043840 is about 1367.0973834432.

The spelling of 2555043840 in words is "two billion, five hundred fifty-five million, forty-three thousand, eight hundred forty".