2565183878 has 16 divisors (see below), whose sum is σ = 4001801280. Its totient is φ = 1232127936.

The previous prime is 2565183871. The next prime is 2565183889. The reversal of 2565183878 is 8783815652.

It is a super-2 number, since 2×2565183878² = 13160336655902237768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565183871) 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, 213551 + ... + 225242.

It is an arithmetic number, because the mean of its divisors is an integer number (250112580).

Almost surely, 2^2565183878 is an apocalyptic number.

2565183878 is a deficient number, since it is larger than the sum of its proper divisors (1436617402).

2565183878 is a wasteful number, since it uses less digits than its factorization.

2565183878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438911.

The product of its digits is 3225600, while the sum is 53.

The square root of 2565183878 is about 50647.6443479852. The cubic root of 2565183878 is about 1368.9035000649.

The spelling of 2565183878 in words is "two billion, five hundred sixty-five million, one hundred eighty-three thousand, eight hundred seventy-eight".