25851919250 has 16 divisors (see below), whose sum is σ = 48394793304. Its totient is φ = 10340767600.

The previous prime is 25851919243. The next prime is 25851919259. The reversal of 25851919250 is 5291915852.

It can be written as a sum of positive squares in 4 ways, for example, as 1916425729 + 23935493521 = 43777^2 + 154711^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25851919195 and 25851919204.

It is not an unprimeable number, because it can be changed into a prime (25851919259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51703589 + ... + 51704088.

Almost surely, 2^25851919250 is an apocalyptic number.

25851919250 is a deficient number, since it is larger than the sum of its proper divisors (22542874054).

25851919250 is a wasteful number, since it uses less digits than its factorization.

25851919250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103407694 (or 103407684 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 47.

The spelling of 25851919250 in words is "twenty-five billion, eight hundred fifty-one million, nine hundred nineteen thousand, two hundred fifty".