80655569 has 8 divisors (see below), whose sum is σ = 82978560. Its totient is φ = 78349600.

The previous prime is 80655563. The next prime is 80655571. The reversal of 80655569 is 96555608.

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-80655569 is a prime.

It is a super-2 number, since 2×80655569² = 13010641621427522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80655563) 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, 5684 + ... + 13914.

It is an arithmetic number, because the mean of its divisors is an integer number (10372320).

Almost surely, 2^80655569 is an apocalyptic number.

It is an amenable number.

80655569 is a deficient number, since it is larger than the sum of its proper divisors (2322991).

80655569 is a wasteful number, since it uses less digits than its factorization.

80655569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8511.

The product of its (nonzero) digits is 324000, while the sum is 44.

The square root of 80655569 is about 8980.8445593942. The cubic root of 80655569 is about 432.0607214172.

The spelling of 80655569 in words is "eighty million, six hundred fifty-five thousand, five hundred sixty-nine".