25261668867218 has 32 divisors (see below), whose sum is σ = 43404015697920. Its totient is φ = 10801860244560.

The previous prime is 25261668867167. The next prime is 25261668867221. The reversal of 25261668867218 is 81276886616252.

It is a Smith number, since the sum of its digits (68) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60144623 + ... + 60563181.

It is an arithmetic number, because the mean of its divisors is an integer number (1356375490560).

Almost surely, 2^{25261668867218} is an apocalyptic number.

25261668867218 is a deficient number, since it is larger than the sum of its proper divisors (18142346830702).

25261668867218 is a wasteful number, since it uses less digits than its factorization.

25261668867218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428342.

The product of its digits is 185794560, while the sum is 68.

The spelling of 25261668867218 in words is "twenty-five trillion, two hundred sixty-one billion, six hundred sixty-eight million, eight hundred sixty-seven thousand, two hundred eighteen".