27940665536 has 168 divisors, whose sum is σ = 68187905280. Its totient is φ = 11294857728.

The previous prime is 27940665509. The next prime is 27940665541. The reversal of 27940665536 is 63556604972.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 15669701 + ... + 15671483.

Almost surely, 2^27940665536 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 27940665536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34093952640).

27940665536 is an abundant number, since it is smaller than the sum of its proper divisors (40247239744).

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

27940665536 is a wasteful number, since it uses less digits than its factorization.

27940665536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2091 (or 2074 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 53.

The spelling of 27940665536 in words is "twenty-seven billion, nine hundred forty million, six hundred sixty-five thousand, five hundred thirty-six".