25838219812 has 12 divisors (see below), whose sum is σ = 45220806540. Its totient is φ = 12917989376.

The previous prime is 25838219807. The next prime is 25838219831. The reversal of 25838219812 is 21891283852.

It can be written as a sum of positive squares in 2 ways, for example, as 9129038116 + 16709181696 = 95546^2 + 129264^2 .

It is a super-2 number, since 2×25838219812² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227137 + ... + 321352.

It is an arithmetic number, because the mean of its divisors is an integer number (3768400545).

Almost surely, 2^25838219812 is an apocalyptic number.

It is an amenable number.

25838219812 is a deficient number, since it is larger than the sum of its proper divisors (19382586728).

25838219812 is a wasteful number, since it uses less digits than its factorization.

25838219812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560270 (or 560268 counting only the distinct ones).

The product of its digits is 552960, while the sum is 49.

The spelling of 25838219812 in words is "twenty-five billion, eight hundred thirty-eight million, two hundred nineteen thousand, eight hundred twelve".