80859577 has 4 divisors (see below), whose sum is σ = 81222400. Its totient is φ = 80496756.

The previous prime is 80859551. The next prime is 80859589. The reversal of 80859577 is 77595808.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-80859577 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80859577.

It is not an unprimeable number, because it can be changed into a prime (80859547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181077 + ... + 181522.

It is an arithmetic number, because the mean of its divisors is an integer number (20305600).

Almost surely, 2^80859577 is an apocalyptic number.

It is an amenable number.

80859577 is a deficient number, since it is larger than the sum of its proper divisors (362823).

80859577 is a wasteful number, since it uses less digits than its factorization.

80859577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362822.

The product of its (nonzero) digits is 705600, while the sum is 49.

The square root of 80859577 is about 8992.1953381808. The cubic root of 80859577 is about 432.4246955887.

The spelling of 80859577 in words is "eighty million, eight hundred fifty-nine thousand, five hundred seventy-seven".