80546509 has 4 divisors (see below), whose sum is σ = 82511100. Its totient is φ = 78581920.

The previous prime is 80546503. The next prime is 80546537. The reversal of 80546509 is 90564508.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15824484 + 64722025 = 3978^2 + 8045^2 .

It is a cyclic number.

It is not a de Polignac number, because 80546509 - 2¹⁷ = 80415437 is a prime.

It is a super-2 number, since 2×80546509² = 12975480224174162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80546503) 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 3 ways as a sum of consecutive naturals, for example, 982234 + ... + 982315.

It is an arithmetic number, because the mean of its divisors is an integer number (20627775).

Almost surely, 2^80546509 is an apocalyptic number.

It is an amenable number.

80546509 is a deficient number, since it is larger than the sum of its proper divisors (1964591).

80546509 is a wasteful number, since it uses less digits than its factorization.

80546509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1964590.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 80546509 is about 8974.7706934495. The cubic root of 80546509 is about 431.8658938017.

The spelling of 80546509 in words is "eighty million, five hundred forty-six thousand, five hundred nine".