80555555 has 8 divisors (see below), whose sum is σ = 98914992. Its totient is φ = 62945568.

The previous prime is 80555551. The next prime is 80555557. The reversal of 80555555 is 55555508.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80555555 - 2² = 80555551 is a prime.

It is a Duffinian number.

80555555 is a modest number, since divided by 55555 gives 805 as remainder.

It is not an unprimeable number, because it can be changed into a prime (80555551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187124 + ... + 187553.

It is an arithmetic number, because the mean of its divisors is an integer number (12364374).

Almost surely, 2^80555555 is an apocalyptic number.

80555555 is a deficient number, since it is larger than the sum of its proper divisors (18359437).

80555555 is a wasteful number, since it uses less digits than its factorization.

80555555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374725.

The product of its (nonzero) digits is 125000, while the sum is 38.

The square root of 80555555 is about 8975.2746476083. The cubic root of 80555555 is about 431.8820604971.

The spelling of 80555555 in words is "eighty million, five hundred fifty-five thousand, five hundred fifty-five".