25809352192 has 80 divisors (see below), whose sum is σ = 55878142320. Its totient is φ = 11838431232.

The previous prime is 25809352189. The next prime is 25809352201. The reversal of 25809352192 is 29125390852.

It is a super-2 number, since 2×25809352192² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1073034 + ... + 1096822.

It is an arithmetic number, because the mean of its divisors is an integer number (698476779).

Almost surely, 2^25809352192 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 25809352192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27939071160).

25809352192 is an abundant number, since it is smaller than the sum of its proper divisors (30068790128).

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

25809352192 is a wasteful number, since it uses less digits than its factorization.

25809352192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23983 (or 23967 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 25809352192 in words is "twenty-five billion, eight hundred nine million, three hundred fifty-two thousand, one hundred ninety-two".