80565641 has 8 divisors (see below), whose sum is σ = 87347400. Its totient is φ = 73867392.

The previous prime is 80565629. The next prime is 80565659. The reversal of 80565641 is 14656508.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2755600 + 77810041 = 1660^2 + 8821^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80565641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80565841) 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 7 ways as a sum of consecutive naturals, for example, 18860 + ... + 22733.

It is an arithmetic number, because the mean of its divisors is an integer number (10918425).

Almost surely, 2^80565641 is an apocalyptic number.

It is an amenable number.

80565641 is a deficient number, since it is larger than the sum of its proper divisors (6781759).

80565641 is a wasteful number, since it uses less digits than its factorization.

80565641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41755.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 80565641 is about 8975.8365069781. The cubic root of 80565641 is about 431.9000844173.

The spelling of 80565641 in words is "eighty million, five hundred sixty-five thousand, six hundred forty-one".