320081160891 has 16 divisors (see below), whose sum is σ = 449496080640. Its totient is φ = 202039809120.

The previous prime is 320081160887. The next prime is 320081161003. The reversal of 320081160891 is 198061180023.

It is not a de Polignac number, because 320081160891 - 2² = 320081160887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320081160491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1521375 + ... + 1718936.

It is an arithmetic number, because the mean of its divisors is an integer number (28093505040).

Almost surely, 2^320081160891 is an apocalyptic number.

320081160891 is a deficient number, since it is larger than the sum of its proper divisors (129414919749).

320081160891 is a wasteful number, since it uses less digits than its factorization.

320081160891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3242066.

The product of its (nonzero) digits is 20736, while the sum is 39.

The spelling of 320081160891 in words is "three hundred twenty billion, eighty-one million, one hundred sixty thousand, eight hundred ninety-one".