27271155564 has 72 divisors (see below), whose sum is σ = 70108710672. Its totient is φ = 8935850880.

The previous prime is 27271155559. The next prime is 27271155577. The reversal of 27271155564 is 46555117272.

27271155564 is a `hidden beast` number, since 2 + 7 + 2 + 71 + 15 + 5 + 564 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5120607 + ... + 5125929.

Almost surely, 2^27271155564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27271155564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35054355336).

27271155564 is an abundant number, since it is smaller than the sum of its proper divisors (42837555108).

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

27271155564 is a wasteful number, since it uses less digits than its factorization.

27271155564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7727 (or 7722 counting only the distinct ones).

The product of its digits is 588000, while the sum is 45.

The spelling of 27271155564 in words is "twenty-seven billion, two hundred seventy-one million, one hundred fifty-five thousand, five hundred sixty-four".