80805855 has 16 divisors (see below), whose sum is σ = 139235040. Its totient is φ = 39781248.

The previous prime is 80805847. The next prime is 80805883. The reversal of 80805855 is 55850808.

It is not a de Polignac number, because 80805855 - 2³ = 80805847 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207000 + ... + 207389.

It is an arithmetic number, because the mean of its divisors is an integer number (8702190).

Almost surely, 2^80805855 is an apocalyptic number.

80805855 is a deficient number, since it is larger than the sum of its proper divisors (58429185).

80805855 is a wasteful number, since it uses less digits than its factorization.

80805855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414410.

The product of its (nonzero) digits is 64000, while the sum is 39.

The square root of 80805855 is about 8989.2076958985. The cubic root of 80805855 is about 432.3289086826.

The spelling of 80805855 in words is "eighty million, eight hundred five thousand, eight hundred fifty-five".