26181273660 has 96 divisors (see below), whose sum is σ = 76018521600. Its totient is φ = 6724650240.

The previous prime is 26181273581. The next prime is 26181273661. The reversal of 26181273660 is 6637218162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26181273661) 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 31 ways as a sum of consecutive naturals, for example, 711105 + ... + 747015.

It is an arithmetic number, because the mean of its divisors is an integer number (791859600).

Almost surely, 2^26181273660 is an apocalyptic number.

26181273660 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 26181273660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38009260800).

26181273660 is an abundant number, since it is smaller than the sum of its proper divisors (49837247940).

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

26181273660 is a wasteful number, since it uses less digits than its factorization.

26181273660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36371 (or 36369 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 26181273660 in words is "twenty-six billion, one hundred eighty-one million, two hundred seventy-three thousand, six hundred sixty".