27055217540 has 96 divisors (see below), whose sum is σ = 61791466464. Its totient is φ = 9891348480.

The previous prime is 27055217503. The next prime is 27055217603. The reversal of 27055217540 is 4571255072.

It can be written as a sum of positive squares in 16 ways, for example, as 6466411396 + 20588806144 = 80414^2 + 143488^2 .

It is a super-2 number, since 2×27055217540² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27055217494 and 27055217503.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12093302 + ... + 12095538.

It is an arithmetic number, because the mean of its divisors is an integer number (643661109).

Almost surely, 2^27055217540 is an apocalyptic number.

27055217540 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 27055217540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30895733232).

27055217540 is an abundant number, since it is smaller than the sum of its proper divisors (34736248924).

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

27055217540 is a wasteful number, since it uses less digits than its factorization.

27055217540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2697 (or 2695 counting only the distinct ones).

The product of its (nonzero) digits is 98000, while the sum is 38.

The spelling of 27055217540 in words is "twenty-seven billion, fifty-five million, two hundred seventeen thousand, five hundred forty".