25628078266 has 16 divisors (see below), whose sum is σ = 44489975040. Its totient is φ = 10844430480.

The previous prime is 25628078263. The next prime is 25628078309. The reversal of 25628078266 is 66287082652.

It is not an unprimeable number, because it can be changed into a prime (25628078263) 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, 11584825 + ... + 11587036.

It is an arithmetic number, because the mean of its divisors is an integer number (2780623440).

Almost surely, 2^25628078266 is an apocalyptic number.

25628078266 is a deficient number, since it is larger than the sum of its proper divisors (18861896774).

25628078266 is a wasteful number, since it uses less digits than its factorization.

25628078266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23171949.

The product of its (nonzero) digits is 3870720, while the sum is 52.

The spelling of 25628078266 in words is "twenty-five billion, six hundred twenty-eight million, seventy-eight thousand, two hundred sixty-six".