2581089278 has 8 divisors (see below), whose sum is σ = 3872062272. Its totient is φ = 1290401856.

The previous prime is 2581089229. The next prime is 2581089289. The reversal of 2581089278 is 8729801852.

It is a happy number.

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

It is a super-2 number, since 2×2581089278² = 13324043722013122568, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47150 + ... + 85937.

It is an arithmetic number, because the mean of its divisors is an integer number (484007784).

Almost surely, 2^2581089278 is an apocalyptic number.

2581089278 is a deficient number, since it is larger than the sum of its proper divisors (1290972994).

2581089278 is a wasteful number, since it uses less digits than its factorization.

2581089278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142786.

The product of its (nonzero) digits is 645120, while the sum is 50.

The square root of 2581089278 is about 50804.4218351120. The cubic root of 2581089278 is about 1371.7269638178.

The spelling of 2581089278 in words is "two billion, five hundred eighty-one million, eighty-nine thousand, two hundred seventy-eight".