80205611 has 4 divisors (see below), whose sum is σ = 81304392. Its totient is φ = 79106832.

The previous prime is 80205599. The next prime is 80205637. The reversal of 80205611 is 11650208.

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

It is a cyclic number.

It is not a de Polignac number, because 80205611 - 2¹⁴ = 80189227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80205661) 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, 549281 + ... + 549426.

It is an arithmetic number, because the mean of its divisors is an integer number (20326098).

Almost surely, 2^80205611 is an apocalyptic number.

80205611 is a deficient number, since it is larger than the sum of its proper divisors (1098781).

80205611 is a wasteful number, since it uses less digits than its factorization.

80205611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098780.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 80205611 is about 8955.7585385047. The cubic root of 80205611 is about 431.2557684309.

Adding to 80205611 its reverse (11650208), we get a palindrome (91855819).

It can be divided in two parts, 8020 and 5611, that added together give a palindrome (13631).

The spelling of 80205611 in words is "eighty million, two hundred five thousand, six hundred eleven".