27288396864 has 63 divisors (see below), whose sum is σ = 78228628023. Its totient is φ = 9094810752.

The previous prime is 27288396833. The next prime is 27288396871. The reversal of 27288396864 is 46869388272.

The square root of 27288396864 is 165192.

It is a perfect power (a square), and thus also a powerful number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3961167 + ... + 3968049.

Almost surely, 2^27288396864 is an apocalyptic number.

27288396864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

27288396864 is the 165192-nd square number.

It is an amenable number.

27288396864 is an abundant number, since it is smaller than the sum of its proper divisors (50940231159).

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

27288396864 is an frugal number, since it uses more digits than its factorization.

27288396864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13784 (or 6888 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 63.

The spelling of 27288396864 in words is "twenty-seven billion, two hundred eighty-eight million, three hundred ninety-six thousand, eight hundred sixty-four".