27561253244 has 96 divisors (see below), whose sum is σ = 59333568000. Its totient is φ = 11166543360.

The previous prime is 27561253243. The next prime is 27561253261. The reversal of 27561253244 is 44235216572.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27561253243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17542979 + ... + 17544549.

It is an arithmetic number, because the mean of its divisors is an integer number (618058000).

Almost surely, 2^27561253244 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 27561253244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29666784000).

27561253244 is an abundant number, since it is smaller than the sum of its proper divisors (31772314756).

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

27561253244 is a wasteful number, since it uses less digits than its factorization.

27561253244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2288 (or 2272 counting only the distinct ones).

The product of its digits is 403200, while the sum is 41.

The spelling of 27561253244 in words is "twenty-seven billion, five hundred sixty-one million, two hundred fifty-three thousand, two hundred forty-four".