25855138255 has 16 divisors (see below), whose sum is σ = 31767167520. Its totient is φ = 20190699648.

The previous prime is 25855138237. The next prime is 25855138303. The reversal of 25855138255 is 55283155852.

It is a cyclic number.

It is not a de Polignac number, because 25855138255 - 2⁵ = 25855138223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25855138199 and 25855138208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 322809 + ... + 394861.

It is an arithmetic number, because the mean of its divisors is an integer number (1985447970).

Almost surely, 2^25855138255 is an apocalyptic number.

25855138255 is a deficient number, since it is larger than the sum of its proper divisors (5912029265).

25855138255 is a wasteful number, since it uses less digits than its factorization.

25855138255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73770.

The product of its digits is 2400000, while the sum is 49.

The spelling of 25855138255 in words is "twenty-five billion, eight hundred fifty-five million, one hundred thirty-eight thousand, two hundred fifty-five".