2558078555 has 4 divisors (see below), whose sum is σ = 3069694272. Its totient is φ = 2046462840.

The previous prime is 2558078543. The next prime is 2558078581. The reversal of 2558078555 is 5558708552.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2558078555 - 2²⁸ = 2289643099 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 255807851 + ... + 255807860.

It is an arithmetic number, because the mean of its divisors is an integer number (767423568).

Almost surely, 2^2558078555 is an apocalyptic number.

2558078555 is a deficient number, since it is larger than the sum of its proper divisors (511615717).

2558078555 is an equidigital number, since it uses as much as digits as its factorization.

2558078555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511615716.

The product of its (nonzero) digits is 2800000, while the sum is 50.

The square root of 2558078555 is about 50577.4510528160. The cubic root of 2558078555 is about 1367.6384191018.

The spelling of 2558078555 in words is "two billion, five hundred fifty-eight million, seventy-eight thousand, five hundred fifty-five".