2578774555 has 16 divisors (see below), whose sum is σ = 3576346560. Its totient is φ = 1748431872.

The previous prime is 2578774547. The next prime is 2578774571. The reversal of 2578774555 is 5554778752.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2578774555 - 2³ = 2578774547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2578774496 and 2578774505.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 410814 + ... + 417043.

It is an arithmetic number, because the mean of its divisors is an integer number (223521660).

Almost surely, 2^2578774555 is an apocalyptic number.

2578774555 is a deficient number, since it is larger than the sum of its proper divisors (997572005).

2578774555 is an equidigital number, since it uses as much as digits as its factorization.

2578774555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827958.

The product of its digits is 13720000, while the sum is 55.

The square root of 2578774555 is about 50781.6360016099. The cubic root of 2578774555 is about 1371.3167858854.

The spelling of 2578774555 in words is "two billion, five hundred seventy-eight million, seven hundred seventy-four thousand, five hundred fifty-five".