27384664640 has 56 divisors (see below), whose sum is σ = 65272002552. Its totient is φ = 10943406080.

The previous prime is 27384664583. The next prime is 27384664651. The reversal of 27384664640 is 4646648372.

It can be written as a sum of positive squares in 4 ways, for example, as 13861765696 + 13522898944 = 117736^2 + 116288^2 .

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, 299192 + ... + 379848.

Almost surely, 2^27384664640 is an apocalyptic number.

27384664640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27384664640 is an abundant number, since it is smaller than the sum of its proper divisors (37887337912).

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

27384664640 is a wasteful number, since it uses less digits than its factorization.

27384664640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81735 (or 81725 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 50.

The spelling of 27384664640 in words is "twenty-seven billion, three hundred eighty-four million, six hundred sixty-four thousand, six hundred forty".