80844985 has 16 divisors (see below), whose sum is σ = 104766480. Its totient is φ = 59535360.

The previous prime is 80844983. The next prime is 80845001. The reversal of 80844985 is 58944808.

It can be written as a sum of positive squares in 8 ways, for example, as 6953769 + 73891216 = 2637^2 + 8596^2 .

It is not a de Polignac number, because 80844985 - 2¹ = 80844983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80844983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25065 + ... + 28105.

It is an arithmetic number, because the mean of its divisors is an integer number (6547905).

Almost surely, 2^80844985 is an apocalyptic number.

It is an amenable number.

80844985 is a deficient number, since it is larger than the sum of its proper divisors (23921495).

80844985 is a wasteful number, since it uses less digits than its factorization.

80844985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3468.

The product of its (nonzero) digits is 368640, while the sum is 46.

The square root of 80844985 is about 8991.3839312978. The cubic root of 80844985 is about 432.3986820930.

The spelling of 80844985 in words is "eighty million, eight hundred forty-four thousand, nine hundred eighty-five".