28961113216 has 32 divisors (see below), whose sum is σ = 65938250880. Its totient is φ = 12411905280.

The previous prime is 28961113201. The next prime is 28961113243. The reversal of 28961113216 is 61231116982.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16160440 + ... + 16162231.

It is an arithmetic number, because the mean of its divisors is an integer number (2060570340).

Almost surely, 2^28961113216 is an apocalyptic number.

It is an amenable number.

28961113216 is an abundant number, since it is smaller than the sum of its proper divisors (36977137664).

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

28961113216 is an equidigital number, since it uses as much as digits as its factorization.

28961113216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32322692 (or 32322680 counting only the distinct ones).

The product of its digits is 31104, while the sum is 40.

The spelling of 28961113216 in words is "twenty-eight billion, nine hundred sixty-one million, one hundred thirteen thousand, two hundred sixteen".