25316561266 has 16 divisors (see below), whose sum is σ = 38292564024. Its totient is φ = 12552569344.

The previous prime is 25316561261. The next prime is 25316561273. The reversal of 25316561266 is 66216561352.

It can be written as a sum of positive squares in 4 ways, for example, as 24626711041 + 689850225 = 156929^2 + 26265^2 .

It is not an unprimeable number, because it can be changed into a prime (25316561261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212646 + ... + 309598.

Almost surely, 2^25316561266 is an apocalyptic number.

25316561266 is a deficient number, since it is larger than the sum of its proper divisors (12976002758).

25316561266 is a wasteful number, since it uses less digits than its factorization.

25316561266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98045.

The product of its digits is 388800, while the sum is 43.

The spelling of 25316561266 in words is "twenty-five billion, three hundred sixteen million, five hundred sixty-one thousand, two hundred sixty-six".