27726680436 has 96 divisors (see below), whose sum is σ = 79662428160. Its totient is φ = 7309125504.

The previous prime is 27726680407. The next prime is 27726680447. The reversal of 27726680436 is 63408662772.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3073845 + ... + 3082851.

It is an arithmetic number, because the mean of its divisors is an integer number (829816960).

Almost surely, 2^27726680436 is an apocalyptic number.

27726680436 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 27726680436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39831214080).

27726680436 is an abundant number, since it is smaller than the sum of its proper divisors (51935747724).

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

27726680436 is a wasteful number, since it uses less digits than its factorization.

27726680436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11853 (or 11851 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 51.

The spelling of 27726680436 in words is "twenty-seven billion, seven hundred twenty-six million, six hundred eighty thousand, four hundred thirty-six".