80811155 has 4 divisors (see below), whose sum is σ = 96973392. Its totient is φ = 64648920.

The previous prime is 80811151. The next prime is 80811163. The reversal of 80811155 is 55111808.

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

It is not a de Polignac number, because 80811155 - 2² = 80811151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80811151) 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, 8081111 + ... + 8081120.

It is an arithmetic number, because the mean of its divisors is an integer number (24243348).

Almost surely, 2^80811155 is an apocalyptic number.

80811155 is a deficient number, since it is larger than the sum of its proper divisors (16162237).

80811155 is a wasteful number, since it uses less digits than its factorization.

80811155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16162236.

The product of its (nonzero) digits is 1600, while the sum is 29.

The square root of 80811155 is about 8989.5024890146. The cubic root of 80811155 is about 432.3383605271.

The spelling of 80811155 in words is "eighty million, eight hundred eleven thousand, one hundred fifty-five".