80911844 has 12 divisors (see below), whose sum is σ = 152487804. Its totient is φ = 37343904.

The previous prime is 80911843. The next prime is 80911877. The reversal of 80911844 is 44811908.

It can be written as a sum of positive squares in 2 ways, for example, as 52417600 + 28494244 = 7240^2 + 5338^2 .

It is not an unprimeable number, because it can be changed into a prime (80911841) 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, 777947 + ... + 778050.

It is an arithmetic number, because the mean of its divisors is an integer number (12707317).

Almost surely, 2^80911844 is an apocalyptic number.

It is an amenable number.

80911844 is a deficient number, since it is larger than the sum of its proper divisors (71575960).

80911844 is a wasteful number, since it uses less digits than its factorization.

80911844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556014 (or 1556012 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 80911844 is about 8995.1011111605. The cubic root of 80911844 is about 432.5178475043.

The spelling of 80911844 in words is "eighty million, nine hundred eleven thousand, eight hundred forty-four".