27065580820 has 24 divisors (see below), whose sum is σ = 56882282184. Its totient is φ = 10817744256.

The previous prime is 27065580739. The next prime is 27065580821. The reversal of 27065580820 is 2808556072.

It can be written as a sum of positive squares in 4 ways, for example, as 9784375056 + 17281205764 = 98916^2 + 131458^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27065580821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504327 + ... + 555406.

It is an arithmetic number, because the mean of its divisors is an integer number (2370095091).

Almost surely, 2^27065580820 is an apocalyptic number.

27065580820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27065580820 is an abundant number, since it is smaller than the sum of its proper divisors (29816701364).

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

27065580820 is a wasteful number, since it uses less digits than its factorization.

27065580820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061019 (or 1061017 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 43.

The spelling of 27065580820 in words is "twenty-seven billion, sixty-five million, five hundred eighty thousand, eight hundred twenty".