25865385894 has 12 divisors (see below), whose sum is σ = 56041669476. Its totient is φ = 8621795292.

The previous prime is 25865385877. The next prime is 25865385901. The reversal of 25865385894 is 49858356852.

25865385894 is a `hidden beast` number, since 2 + 5 + 8 + 6 + 538 + 5 + 8 + 94 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 718482924 + ... + 718482959.

It is an arithmetic number, because the mean of its divisors is an integer number (4670139123).

Almost surely, 2^25865385894 is an apocalyptic number.

25865385894 is an abundant number, since it is smaller than the sum of its proper divisors (30176283582).

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

25865385894 is a wasteful number, since it uses less digits than its factorization.

25865385894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436965891 (or 1436965888 counting only the distinct ones).

The product of its digits is 82944000, while the sum is 63.

The spelling of 25865385894 in words is "twenty-five billion, eight hundred sixty-five million, three hundred eighty-five thousand, eight hundred ninety-four".