27643227864 has 32 divisors (see below), whose sum is σ = 78980651520. Its totient is φ = 7898065056.

The previous prime is 27643227863. The next prime is 27643227869. The reversal of 27643227864 is 46872234672.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27643227863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82271344 + ... + 82271679.

It is an arithmetic number, because the mean of its divisors is an integer number (2468145360).

Almost surely, 2^27643227864 is an apocalyptic number.

27643227864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

27643227864 is an abundant number, since it is smaller than the sum of its proper divisors (51337423656).

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

27643227864 is a wasteful number, since it uses less digits than its factorization.

27643227864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164543039 (or 164543035 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 51.

The spelling of 27643227864 in words is "twenty-seven billion, six hundred forty-three million, two hundred twenty-seven thousand, eight hundred sixty-four".