80505187 has 16 divisors (see below), whose sum is σ = 95104000. Its totient is φ = 68108040.

The previous prime is 80505169. The next prime is 80505199. The reversal of 80505187 is 78150508.

It is not a de Polignac number, because 80505187 - 2¹¹ = 80503139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80505127) 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, 25612 + ... + 28582.

It is an arithmetic number, because the mean of its divisors is an integer number (5944000).

Almost surely, 2^80505187 is an apocalyptic number.

80505187 is a deficient number, since it is larger than the sum of its proper divisors (14598813).

80505187 is an equidigital number, since it uses as much as digits as its factorization.

80505187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3071 (or 3057 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 34.

The square root of 80505187 is about 8972.4682780158. The cubic root of 80505187 is about 431.7920291684.

The spelling of 80505187 in words is "eighty million, five hundred five thousand, one hundred eighty-seven".