27081324540 has 288 divisors, whose sum is σ = 87263414784. Its totient is φ = 7047855360.

The previous prime is 27081324497. The next prime is 27081324563. The reversal of 27081324540 is 4542318072.

It is a happy number.

27081324540 is a `hidden beast` number, since 2 + 7 + 0 + 81 + 32 + 4 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 27081324495 and 27081324504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 49508547 + ... + 49509093.

It is an arithmetic number, because the mean of its divisors is an integer number (302997968).

Almost surely, 2^27081324540 is an apocalyptic number.

27081324540 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 27081324540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43631707392).

27081324540 is an abundant number, since it is smaller than the sum of its proper divisors (60182090244).

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

27081324540 is a wasteful number, since it uses less digits than its factorization.

27081324540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799 (or 785 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The spelling of 27081324540 in words is "twenty-seven billion, eighty-one million, three hundred twenty-four thousand, five hundred forty".