2557780855 has 16 divisors (see below), whose sum is σ = 3692436480. Its totient is φ = 1661595552.

The previous prime is 2557780853. The next prime is 2557780861. The reversal of 2557780855 is 5580877552.

It is a cyclic number.

It is not a de Polignac number, because 2557780855 - 2¹ = 2557780853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2557780853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1922479 + ... + 1923808.

It is an arithmetic number, because the mean of its divisors is an integer number (230777280).

Almost surely, 2^2557780855 is an apocalyptic number.

2557780855 is a deficient number, since it is larger than the sum of its proper divisors (1134655625).

2557780855 is a wasteful number, since it uses less digits than its factorization.

2557780855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3846318.

The product of its (nonzero) digits is 3920000, while the sum is 52.

The square root of 2557780855 is about 50574.5079560840. The cubic root of 2557780855 is about 1367.5853634269.

The spelling of 2557780855 in words is "two billion, five hundred fifty-seven million, seven hundred eighty thousand, eight hundred fifty-five".