25442680266 has 24 divisors (see below), whose sum is σ = 55177805124. Its totient is φ = 8472893760.

The previous prime is 25442680261. The next prime is 25442680283. The reversal of 25442680266 is 66208624452.

25442680266 is a `hidden beast` number, since 2 + 544 + 2 + 6 + 80 + 26 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 25199975025 + 242705241 = 158745^2 + 15579^2 .

It is not an unprimeable number, because it can be changed into a prime (25442680261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 647011 + ... + 685206.

Almost surely, 2^25442680266 is an apocalyptic number.

25442680266 is an abundant number, since it is smaller than the sum of its proper divisors (29735124858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25442680266 is a wasteful number, since it uses less digits than its factorization.

25442680266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333286 (or 1333283 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 45.

The spelling of 25442680266 in words is "twenty-five billion, four hundred forty-two million, six hundred eighty thousand, two hundred sixty-six".