27491961248 has 48 divisors (see below), whose sum is σ = 55613992896. Its totient is φ = 13370434560.

The previous prime is 27491961239. The next prime is 27491961293. The reversal of 27491961248 is 84216919472.

It is a Cunningham number, because it is equal to 165807²-1.

It is a self number, because there is not a number n which added to its sum of digits gives 27491961248.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290165 + ... + 373067.

It is an arithmetic number, because the mean of its divisors is an integer number (1158624852).

Almost surely, 2^27491961248 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 27491961248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27806996448).

27491961248 is an abundant number, since it is smaller than the sum of its proper divisors (28122031648).

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

27491961248 is a wasteful number, since it uses less digits than its factorization.

27491961248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83197 (or 83189 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 53.

The spelling of 27491961248 in words is "twenty-seven billion, four hundred ninety-one million, nine hundred sixty-one thousand, two hundred forty-eight".