25765386255 has 256 divisors, whose sum is σ = 57944678400. Its totient is φ = 10601902080.

The previous prime is 25765386253. The next prime is 25765386263. The reversal of 25765386255 is 55268356752.

It is a happy number.

25765386255 is a `hidden beast` number, since 2 + 5 + 7 + 6 + 5 + 3 + 8 + 625 + 5 = 666.

It is a Cunningham number, because it is equal to 160516²-1.

It is not a de Polignac number, because 25765386255 - 2¹ = 25765386253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25765386253) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 25842417 + ... + 25843413.

It is an arithmetic number, because the mean of its divisors is an integer number (226346400).

Almost surely, 2^25765386255 is an apocalyptic number.

25765386255 is an abundant number, since it is smaller than the sum of its proper divisors (32179292145).

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

25765386255 is a wasteful number, since it uses less digits than its factorization.

25765386255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111 (or 1105 counting only the distinct ones).

The product of its digits is 15120000, while the sum is 54.

The spelling of 25765386255 in words is "twenty-five billion, seven hundred sixty-five million, three hundred eighty-six thousand, two hundred fifty-five".