80577509 has 8 divisors (see below), whose sum is σ = 81554688. Its totient is φ = 79606240.

The previous prime is 80577503. The next prime is 80577521. The reversal of 80577509 is 90577508.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80577509 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 (80577503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29804 + ... + 32394.

It is an arithmetic number, because the mean of its divisors is an integer number (10194336).

Almost surely, 2^80577509 is an apocalyptic number.

It is an amenable number.

80577509 is a deficient number, since it is larger than the sum of its proper divisors (977179).

80577509 is a wasteful number, since it uses less digits than its factorization.

80577509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2955.

The product of its (nonzero) digits is 88200, while the sum is 41.

The square root of 80577509 is about 8976.4975909316. The cubic root of 80577509 is about 431.9212908872.

Subtracting 80577509 from its reverse (90577508), we obtain a palindrome (9999999).

The spelling of 80577509 in words is "eighty million, five hundred seventy-seven thousand, five hundred nine".