25855816 has 32 divisors (see below), whose sum is σ = 55592640. Its totient is φ = 11043648.

The previous prime is 25855799. The next prime is 25855867. The reversal of 25855816 is 61855852.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21651 + ... + 22813.

It is an arithmetic number, because the mean of its divisors is an integer number (1737270).

Almost surely, 2^25855816 is an apocalyptic number.

It is an amenable number.

25855816 is an abundant number, since it is smaller than the sum of its proper divisors (29736824).

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

25855816 is a wasteful number, since it uses less digits than its factorization.

25855816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573 (or 1569 counting only the distinct ones).

The product of its digits is 96000, while the sum is 40.

The square root of 25855816 is about 5084.8614533731. The cubic root of 25855816 is about 295.7009702293.

The spelling of 25855816 in words is "twenty-five million, eight hundred fifty-five thousand, eight hundred sixteen".