27447823644 has 12 divisors (see below), whose sum is σ = 64044921864. Its totient is φ = 9149274544.

The previous prime is 27447823621. The next prime is 27447823649. The reversal of 27447823644 is 44632874472.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27447823649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1143659307 + ... + 1143659330.

It is an arithmetic number, because the mean of its divisors is an integer number (5337076822).

Almost surely, 2^27447823644 is an apocalyptic number.

It is an amenable number.

27447823644 is an abundant number, since it is smaller than the sum of its proper divisors (36597098220).

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

27447823644 is a wasteful number, since it uses less digits than its factorization.

27447823644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2287318644 (or 2287318642 counting only the distinct ones).

The product of its digits is 7225344, while the sum is 51.

The spelling of 27447823644 in words is "twenty-seven billion, four hundred forty-seven million, eight hundred twenty-three thousand, six hundred forty-four".