27820943616 has 36 divisors (see below), whose sum is σ = 74044284272. Its totient is φ = 9273647616.

The previous prime is 27820943611. The next prime is 27820943653. The reversal of 27820943616 is 61634902872.

It is a super-4 number, since 4×27820943616⁴ (a number of 43 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (27820943611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18111826 + ... + 18113361.

Almost surely, 2^27820943616 is an apocalyptic number.

It is an amenable number.

27820943616 is an abundant number, since it is smaller than the sum of its proper divisors (46223340656).

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

27820943616 is an equidigital number, since it uses as much as digits as its factorization.

27820943616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36225206 (or 36225192 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 48.

The spelling of 27820943616 in words is "twenty-seven billion, eight hundred twenty million, nine hundred forty-three thousand, six hundred sixteen".