25439839152 has 160 divisors (see below), whose sum is σ = 81245133312. Its totient is φ = 6679590912.

The previous prime is 25439839141. The next prime is 25439839189. The reversal of 25439839152 is 25193893452.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25439839095 and 25439839104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 978708 + ... + 1004364.

Almost surely, 2^25439839152 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 25439839152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40622566656).

25439839152 is an abundant number, since it is smaller than the sum of its proper divisors (55805294160).

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

25439839152 is a wasteful number, since it uses less digits than its factorization.

25439839152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25915 (or 25909 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 51.

The spelling of 25439839152 in words is "twenty-five billion, four hundred thirty-nine million, eight hundred thirty-nine thousand, one hundred fifty-two".