27997669216 has 72 divisors (see below), whose sum is σ = 60636879072. Its totient is φ = 12715718400.

The previous prime is 27997669207. The next prime is 27997669237. The reversal of 27997669216 is 61296679972.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6553161 + ... + 6557431.

It is an arithmetic number, because the mean of its divisors is an integer number (842178876).

Almost surely, 2^27997669216 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 27997669216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30318439536).

27997669216 is an abundant number, since it is smaller than the sum of its proper divisors (32639209856).

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

27997669216 is a wasteful number, since it uses less digits than its factorization.

27997669216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5996 (or 5977 counting only the distinct ones).

The product of its digits is 30862944, while the sum is 64.

The spelling of 27997669216 in words is "twenty-seven billion, nine hundred ninety-seven million, six hundred sixty-nine thousand, two hundred sixteen".