25775454407878 has 32 divisors (see below), whose sum is σ = 44433964224000. Its totient is φ = 10984819152384.

The previous prime is 25775454407869. The next prime is 25775454407897. The reversal of 25775454407878 is 87870445457752.

It is a self number, because there is not a number n which added to its sum of digits gives 25775454407878.

It is a congruent 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, 2219238 + ... + 7515046.

It is an arithmetic number, because the mean of its divisors is an integer number (1388561382000).

Almost surely, 2^{25775454407878} is an apocalyptic number.

25775454407878 is a deficient number, since it is larger than the sum of its proper divisors (18658509816122).

25775454407878 is a wasteful number, since it uses less digits than its factorization.

25775454407878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5297764.

The product of its (nonzero) digits is 2458624000, while the sum is 73.

The spelling of 25775454407878 in words is "twenty-five trillion, seven hundred seventy-five billion, four hundred fifty-four million, four hundred seven thousand, eight hundred seventy-eight".