27447553247868 has 144 divisors (see below), whose sum is σ = 75157511266656. Its totient is φ = 8395899333120.

The previous prime is 27447553247861. The next prime is 27447553247887. The reversal of 27447553247868 is 86874235574472.

27447553247868 is a `hidden beast` number, since 2 + 7 + 4 + 4 + 7 + 5 + 532 + 4 + 7 + 86 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 27447553247796 and 27447553247805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27447553247861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57189778 + ... + 57667718.

It is an arithmetic number, because the mean of its divisors is an integer number (521927161574).

Almost surely, 2^{27447553247868} 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 27447553247868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37578755633328).

27447553247868 is an abundant number, since it is smaller than the sum of its proper divisors (47709958018788).

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

27447553247868 is a wasteful number, since it uses less digits than its factorization.

27447553247868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478684 (or 478679 counting only the distinct ones).

The product of its digits is 2528870400, while the sum is 72.

The spelling of 27447553247868 in words is "twenty-seven trillion, four hundred forty-seven billion, five hundred fifty-three million, two hundred forty-seven thousand, eight hundred sixty-eight".