80505855 has 24 divisors (see below), whose sum is σ = 139752288. Its totient is φ = 42872256.

The previous prime is 80505851. The next prime is 80505871. The reversal of 80505855 is 55850508.

It is not a de Polignac number, because 80505855 - 2² = 80505851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80505851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57949 + ... + 59321.

It is an arithmetic number, because the mean of its divisors is an integer number (5823012).

Almost surely, 2^80505855 is an apocalyptic number.

80505855 is a deficient number, since it is larger than the sum of its proper divisors (59246433).

80505855 is a wasteful number, since it uses less digits than its factorization.

80505855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2687 (or 2684 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 36.

The square root of 80505855 is about 8972.5055029239. The cubic root of 80505855 is about 431.7932234446.

The spelling of 80505855 in words is "eighty million, five hundred five thousand, eight hundred fifty-five".