25640455110255 has 64 divisors (see below), whose sum is σ = 45826859427840. Its totient is φ = 13601952777600.

The previous prime is 25640455110233. The next prime is 25640455110311. The reversal of 25640455110255 is 55201155404652.

It is a happy number.

25640455110255 is a `hidden beast` number, since 2 + 5 + 6 + 40 + 4 + 551 + 1 + 0 + 2 + 55 = 666.

It is not a de Polignac number, because 25640455110255 - 2¹² = 25640455106159 is a prime.

It is a super-4 number, since 4×25640455110255⁴ (a number of 55 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 25640455110255.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18593569 + ... + 19924901.

It is an arithmetic number, because the mean of its divisors is an integer number (716044678560).

Almost surely, 2^{25640455110255} is an apocalyptic number.

25640455110255 is a deficient number, since it is larger than the sum of its proper divisors (20186404317585).

25640455110255 is a wasteful number, since it uses less digits than its factorization.

25640455110255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332109 (or 1332103 counting only the distinct ones).

The product of its (nonzero) digits is 1200000, while the sum is 45.

The spelling of 25640455110255 in words is "twenty-five trillion, six hundred forty billion, four hundred fifty-five million, one hundred ten thousand, two hundred fifty-five".