25785203856 has 40 divisors (see below), whose sum is σ = 66620423520. Its totient is φ = 8593952256.

The previous prime is 25785203813. The next prime is 25785203887. The reversal of 25785203856 is 65830258752.

It is a junction number, because it is equal to n+sod(n) for n = 25785203799 and 25785203808.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392856 + ... + 453768.

It is an arithmetic number, because the mean of its divisors is an integer number (1665510588).

Almost surely, 2^25785203856 is an apocalyptic number.

It is an amenable number.

25785203856 is an abundant number, since it is smaller than the sum of its proper divisors (40835219664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25785203856 is a wasteful number, since it uses less digits than its factorization.

25785203856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69743 (or 69737 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 51.

The spelling of 25785203856 in words is "twenty-five billion, seven hundred eighty-five million, two hundred three thousand, eight hundred fifty-six".