27473281540 has 12 divisors (see below), whose sum is σ = 57693891276. Its totient is φ = 10989312608.

The previous prime is 27473281531. The next prime is 27473281541. The reversal of 27473281540 is 4518237472.

It can be written as a sum of positive squares in 2 ways, for example, as 5353263556 + 22120017984 = 73166^2 + 148728^2 .

It is a super-2 number, since 2×27473281540² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27473281541) 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, 686832019 + ... + 686832058.

It is an arithmetic number, because the mean of its divisors is an integer number (4807824273).

Almost surely, 2^27473281540 is an apocalyptic number.

27473281540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27473281540 is an abundant number, since it is smaller than the sum of its proper divisors (30220609736).

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

27473281540 is a wasteful number, since it uses less digits than its factorization.

27473281540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373664086 (or 1373664084 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 43.

The spelling of 27473281540 in words is "twenty-seven billion, four hundred seventy-three million, two hundred eighty-one thousand, five hundred forty".