25849856886 has 16 divisors (see below), whose sum is σ = 59085387264. Its totient is φ = 7385673384.

The previous prime is 25849856873. The next prime is 25849856927. The reversal of 25849856886 is 68865894852.

It is a self number, because there is not a number n which added to its sum of digits gives 25849856886.

It is a congruent number.

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, 307736350 + ... + 307736433.

It is an arithmetic number, because the mean of its divisors is an integer number (3692836704).

Almost surely, 2^25849856886 is an apocalyptic number.

25849856886 is an abundant number, since it is smaller than the sum of its proper divisors (33235530378).

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

25849856886 is a wasteful number, since it uses less digits than its factorization.

25849856886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615472795.

The product of its digits is 265420800, while the sum is 69.

The spelling of 25849856886 in words is "twenty-five billion, eight hundred forty-nine million, eight hundred fifty-six thousand, eight hundred eighty-six".