80724985 has 16 divisors (see below), whose sum is σ = 106106112. Its totient is φ = 58470400.

The previous prime is 80724979. The next prime is 80724997. The reversal of 80724985 is 58942708.

It is not a de Polignac number, because 80724985 - 2²⁵ = 47170553 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11280 + ... + 16990.

It is an arithmetic number, because the mean of its divisors is an integer number (6631632).

Almost surely, 2^80724985 is an apocalyptic number.

It is an amenable number.

80724985 is a deficient number, since it is larger than the sum of its proper divisors (25381127).

80724985 is a wasteful number, since it uses less digits than its factorization.

80724985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5984.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 80724985 is about 8984.7083981618. The cubic root of 80724985 is about 432.1846365102.

The spelling of 80724985 in words is "eighty million, seven hundred twenty-four thousand, nine hundred eighty-five".