25878787876 has 24 divisors (see below), whose sum is σ = 46493669376. Its totient is φ = 12597766080.

The previous prime is 25878787871. The next prime is 25878787927. The reversal of 25878787876 is 67878787852.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 25878787799 and 25878787808.

It is not an unprimeable number, because it can be changed into a prime (25878787871) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 324441 + ... + 396256.

It is an arithmetic number, because the mean of its divisors is an integer number (1937236224).

Almost surely, 2^25878787876 is an apocalyptic number.

It is an amenable number.

25878787876 is a deficient number, since it is larger than the sum of its proper divisors (20614881500).

25878787876 is a wasteful number, since it uses less digits than its factorization.

25878787876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720939 (or 720937 counting only the distinct ones).

The product of its digits is 590069760, while the sum is 73.

The spelling of 25878787876 in words is "twenty-five billion, eight hundred seventy-eight million, seven hundred eighty-seven thousand, eight hundred seventy-six".