80118811 has 4 divisors (see below), whose sum is σ = 80137800. Its totient is φ = 80099824.

The previous prime is 80118809. The next prime is 80118823. The reversal of 80118811 is 11881108.

80118811 is a nontrivial binomial coefficient, being equal to C(12659, 2).

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

It is not a de Polignac number, because 80118811 - 2¹ = 80118809 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 80118811.

It is not an unprimeable number, because it can be changed into a prime (80113811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1 + ... + 12658.

It is an arithmetic number, because the mean of its divisors is an integer number (20034450).

Almost surely, 2^80118811 is an apocalyptic number.

80118811 is the 12658-th triangular number.

80118811 is the 4220-th centered nonagonal number.

80118811 is a deficient number, since it is larger than the sum of its proper divisors (18989).

80118811 is a wasteful number, since it uses less digits than its factorization.

80118811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18988.

The product of its (nonzero) digits is 512, while the sum is 28.

The square root of 80118811 is about 8950.9111826674. The cubic root of 80118811 is about 431.1001412791.

Adding to 80118811 its reverse (11881108), we get a palindrome (91999919).

The spelling of 80118811 in words is "eighty million, one hundred eighteen thousand, eight hundred eleven".