25384485816 has 96 divisors (see below), whose sum is σ = 72898909200. Its totient is φ = 7952256000.

The previous prime is 25384485761. The next prime is 25384485817. The reversal of 25384485816 is 61858448352.

25384485816 is a `hidden beast` number, since 2 + 5 + 3 + 84 + 485 + 81 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25384485817) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 853191 + ... + 882441.

Almost surely, 2^25384485816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25384485816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36449454600).

25384485816 is an abundant number, since it is smaller than the sum of its proper divisors (47514423384).

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

25384485816 is a wasteful number, since it uses less digits than its factorization.

25384485816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29989 (or 29982 counting only the distinct ones).

The product of its digits is 7372800, while the sum is 54.

The spelling of 25384485816 in words is "twenty-five billion, three hundred eighty-four million, four hundred eighty-five thousand, eight hundred sixteen".