25764561266 has 8 divisors (see below), whose sum is σ = 39029484204. Its totient is φ = 12754733200.

The previous prime is 25764561239. The next prime is 25764561269. The reversal of 25764561266 is 66216546752.

It can be written as a sum of positive squares in 2 ways, for example, as 22976193241 + 2788368025 = 151579^2 + 52805^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (25764561269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63773465 + ... + 63773868.

Almost surely, 2^25764561266 is an apocalyptic number.

25764561266 is a deficient number, since it is larger than the sum of its proper divisors (13264922938).

25764561266 is a wasteful number, since it uses less digits than its factorization.

25764561266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127547436.

The product of its digits is 3628800, while the sum is 50.

The spelling of 25764561266 in words is "twenty-five billion, seven hundred sixty-four million, five hundred sixty-one thousand, two hundred sixty-six".