25682849556 has 144 divisors (see below), whose sum is σ = 78065164800. Its totient is φ = 6416931456.

The previous prime is 25682849531. The next prime is 25682849593. The reversal of 25682849556 is 65594828652.

It is a super-2 number, since 2×25682849556² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25682849556.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 222115 + ... + 317333.

It is an arithmetic number, because the mean of its divisors is an integer number (542119200).

Almost surely, 2^25682849556 is an apocalyptic number.

25682849556 is a gapful number since it is divisible by the number (26) 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 25682849556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39032582400).

25682849556 is an abundant number, since it is smaller than the sum of its proper divisors (52382315244).

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

25682849556 is a wasteful number, since it uses less digits than its factorization.

25682849556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95278 (or 95263 counting only the distinct ones).

The product of its digits is 41472000, while the sum is 60.

The spelling of 25682849556 in words is "twenty-five billion, six hundred eighty-two million, eight hundred forty-nine thousand, five hundred fifty-six".