80386561 has 4 divisors (see below), whose sum is σ = 80426052. Its totient is φ = 80347072.

The previous prime is 80386517. The next prime is 80386577. The reversal of 80386561 is 16568308.

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 26584336 + 53802225 = 5156^2 + 7335^2 .

It is a cyclic number.

It is not a de Polignac number, because 80386561 - 2¹⁹ = 79862273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80386561.

It is not an unprimeable number, because it can be changed into a prime (80386661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16516 + ... + 20821.

It is an arithmetic number, because the mean of its divisors is an integer number (20106513).

Almost surely, 2^80386561 is an apocalyptic number.

It is an amenable number.

80386561 is a deficient number, since it is larger than the sum of its proper divisors (39491).

80386561 is a wasteful number, since it uses less digits than its factorization.

80386561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39490.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 80386561 is about 8965.8552854705. The cubic root of 80386561 is about 431.5798401880.

The spelling of 80386561 in words is "eighty million, three hundred eighty-six thousand, five hundred sixty-one".