80857559 has 16 divisors (see below), whose sum is σ = 90720000. Its totient is φ = 71616384.

The previous prime is 80857549. The next prime is 80857577. The reversal of 80857559 is 95575808.

It is a cyclic number.

It is not a de Polignac number, because 80857559 - 2⁸ = 80857303 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 (80857549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53192 + ... + 54690.

It is an arithmetic number, because the mean of its divisors is an integer number (5670000).

Almost surely, 2^80857559 is an apocalyptic number.

80857559 is a deficient number, since it is larger than the sum of its proper divisors (9862441).

80857559 is a wasteful number, since it uses less digits than its factorization.

80857559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1702.

The product of its (nonzero) digits is 504000, while the sum is 47.

The square root of 80857559 is about 8992.0831290641. The cubic root of 80857559 is about 432.4210982399.

The spelling of 80857559 in words is "eighty million, eight hundred fifty-seven thousand, five hundred fifty-nine".