25899855 has 16 divisors (see below), whose sum is σ = 42059904. Its totient is φ = 13606560.

The previous prime is 25899829. The next prime is 25899893. The reversal of 25899855 is 55899852.

It is not a de Polignac number, because 25899855 - 2⁹ = 25899343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25899798 and 25899807.

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, 11881 + ... + 13890.

It is an arithmetic number, because the mean of its divisors is an integer number (2628744).

Almost surely, 2^25899855 is an apocalyptic number.

25899855 is a deficient number, since it is larger than the sum of its proper divisors (16160049).

25899855 is a wasteful number, since it uses less digits than its factorization.

25899855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25846.

The product of its digits is 1296000, while the sum is 51.

The square root of 25899855 is about 5089.1900141378. The cubic root of 25899855 is about 295.8687595390.

The spelling of 25899855 in words is "twenty-five million, eight hundred ninety-nine thousand, eight hundred fifty-five".