80730561 has 8 divisors (see below), whose sum is σ = 108022240. Its totient is φ = 53629632.

The previous prime is 80730557. The next prime is 80730571. The reversal of 80730561 is 16503708.

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

It is not a de Polignac number, because 80730561 - 2² = 80730557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80730571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46696 + ... + 48393.

It is an arithmetic number, because the mean of its divisors is an integer number (13502780).

Almost surely, 2^80730561 is an apocalyptic number.

It is an amenable number.

80730561 is a deficient number, since it is larger than the sum of its proper divisors (27291679).

80730561 is a wasteful number, since it uses less digits than its factorization.

80730561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95375.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 80730561 is about 8985.0186978103. The cubic root of 80730561 is about 432.1945871925.

The spelling of 80730561 in words is "eighty million, seven hundred thirty thousand, five hundred sixty-one".