25965839338 has 32 divisors (see below), whose sum is σ = 41642700048. Its totient is φ = 12100300800.

The previous prime is 25965839329. The next prime is 25965839381. The reversal of 25965839338 is 83393856952.

It can be written as a sum of positive squares in 8 ways, for example, as 17831062089 + 8134777249 = 133533^2 + 90193^2 .

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1954398 + ... + 1967638.

Almost surely, 2^25965839338 is an apocalyptic number.

25965839338 is a deficient number, since it is larger than the sum of its proper divisors (15676860710).

25965839338 is a wasteful number, since it uses less digits than its factorization.

25965839338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13818.

The product of its digits is 41990400, while the sum is 61.

The spelling of 25965839338 in words is "twenty-five billion, nine hundred sixty-five million, eight hundred thirty-nine thousand, three hundred thirty-eight".