27015005440 has 36 divisors (see below), whose sum is σ = 64709383284. Its totient is φ = 10806001664.

The previous prime is 27015005431. The next prime is 27015005441. The reversal of 27015005440 is 4450051072.

It can be written as a sum of positive squares in 2 ways, for example, as 3116318976 + 23898686464 = 55824^2 + 154592^2 .

It is a junction number, because it is equal to n+sod(n) for n = 27015005399 and 27015005408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27015005441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10551457 + ... + 10554016.

It is an arithmetic number, because the mean of its divisors is an integer number (1797482869).

Almost surely, 2^27015005440 is an apocalyptic number.

27015005440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27015005440 is an abundant number, since it is smaller than the sum of its proper divisors (37694377844).

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

27015005440 is an equidigital number, since it uses as much as digits as its factorization.

27015005440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21105494 (or 21105480 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 28.

The spelling of 27015005440 in words is "twenty-seven billion, fifteen million, five thousand, four hundred forty".