2578647455 has 4 divisors (see below), whose sum is σ = 3094376952. Its totient is φ = 2062917960.

The previous prime is 2578647439. The next prime is 2578647469. The reversal of 2578647455 is 5547468752.

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

It is not a de Polignac number, because 2578647455 - 2⁴ = 2578647439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2578647397 and 2578647406.

It is a congruent 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, 257864741 + ... + 257864750.

It is an arithmetic number, because the mean of its divisors is an integer number (773594238).

Almost surely, 2^2578647455 is an apocalyptic number.

2578647455 is a deficient number, since it is larger than the sum of its proper divisors (515729497).

2578647455 is an equidigital number, since it uses as much as digits as its factorization.

2578647455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515729496.

The product of its digits is 9408000, while the sum is 53.

The square root of 2578647455 is about 50780.3845495483. The cubic root of 2578647455 is about 1371.2942561627.

The spelling of 2578647455 in words is "two billion, five hundred seventy-eight million, six hundred forty-seven thousand, four hundred fifty-five".