25839855264 has 96 divisors (see below), whose sum is σ = 70877528064. Its totient is φ = 8227296000.

The previous prime is 25839855179. The next prime is 25839855269. The reversal of 25839855264 is 46255893852.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (25839855269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1650417 + ... + 1665999.

It is an arithmetic number, because the mean of its divisors is an integer number (738307584).

Almost surely, 2^25839855264 is an apocalyptic number.

25839855264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25839855264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35438764032).

25839855264 is an abundant number, since it is smaller than the sum of its proper divisors (45037672800).

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

25839855264 is a wasteful number, since it uses less digits than its factorization.

25839855264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16370 (or 16362 counting only the distinct ones).

The product of its digits is 20736000, while the sum is 57.

The spelling of 25839855264 in words is "twenty-five billion, eight hundred thirty-nine million, eight hundred fifty-five thousand, two hundred sixty-four".