26505625820 has 48 divisors (see below), whose sum is σ = 59025970080. Its totient is φ = 9963362304.

The previous prime is 26505625733. The next prime is 26505625843. The reversal of 26505625820 is 2852650562.

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 15 ways as a sum of consecutive naturals, for example, 164912 + ... + 283208.

It is an arithmetic number, because the mean of its divisors is an integer number (1229707710).

Almost surely, 2^26505625820 is an apocalyptic number.

26505625820 is a gapful number since it is divisible by the number (20) 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 26505625820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29512985040).

26505625820 is an abundant number, since it is smaller than the sum of its proper divisors (32520344260).

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

26505625820 is a wasteful number, since it uses less digits than its factorization.

26505625820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118982 (or 118980 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 41.

The spelling of 26505625820 in words is "twenty-six billion, five hundred five million, six hundred twenty-five thousand, eight hundred twenty".