2578134689 has 8 divisors (see below), whose sum is σ = 2785215720. Its totient is φ = 2372305536.

The previous prime is 2578134679. The next prime is 2578134707. The reversal of 2578134689 is 9864318752.

2578134689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 846400 + 2577288289 = 920^2 + 50767^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2578134689 - 2²⁸ = 2309699233 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2578134689.

It is not an unprimeable number, because it can be changed into a prime (2578134619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308684 + ... + 316925.

It is an arithmetic number, because the mean of its divisors is an integer number (348151965).

Almost surely, 2^2578134689 is an apocalyptic number.

It is an amenable number.

2578134689 is a deficient number, since it is larger than the sum of its proper divisors (207081031).

2578134689 is a wasteful number, since it uses less digits than its factorization.

2578134689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625939.

The product of its digits is 2903040, while the sum is 53.

The square root of 2578134689 is about 50775.3354395616. The cubic root of 2578134689 is about 1371.2033558366.

The spelling of 2578134689 in words is "two billion, five hundred seventy-eight million, one hundred thirty-four thousand, six hundred eighty-nine".