80857855047 has 4 divisors (see below), whose sum is σ = 107810473400. Its totient is φ = 53905236696.

The previous prime is 80857855037. The next prime is 80857855051. The reversal of 80857855047 is 74055875808.

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

It is not a de Polignac number, because 80857855047 - 2¹⁰ = 80857854023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80857855037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13476309172 + ... + 13476309177.

It is an arithmetic number, because the mean of its divisors is an integer number (26952618350).

Almost surely, 2^80857855047 is an apocalyptic number.

80857855047 is a deficient number, since it is larger than the sum of its proper divisors (26952618353).

80857855047 is a wasteful number, since it uses less digits than its factorization.

80857855047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26952618352.

The product of its (nonzero) digits is 12544000, while the sum is 57.

The spelling of 80857855047 in words is "eighty billion, eight hundred fifty-seven million, eight hundred fifty-five thousand, forty-seven".