25765386256 has 15 divisors (see below), whose sum is σ = 49921679901. Its totient is φ = 12882372096.

The previous prime is 25765386253. The next prime is 25765386263. The reversal of 25765386256 is 65268356752.

It is a happy number.

The square root of 25765386256 is 160516.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 216560656 + 25548825600 = 14716^2 + 159840^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25765386197 and 25765386206.

It is not an unprimeable number, because it can be changed into a prime (25765386253) 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 2 ways as a sum of consecutive naturals, for example, 622000 + ... + 662128.

Almost surely, 2^25765386256 is an apocalyptic number.

25765386256 is the 160516-th square number.

It is an amenable number.

25765386256 is a deficient number, since it is larger than the sum of its proper divisors (24156293645).

25765386256 is an frugal number, since it uses more digits than its factorization.

25765386256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80266 (or 40131 counting only the distinct ones).

The product of its digits is 18144000, while the sum is 55.

The spelling of 25765386256 in words is "twenty-five billion, seven hundred sixty-five million, three hundred eighty-six thousand, two hundred fifty-six".