80645 has 6 divisors (see below), whose sum is σ = 97542. Its totient is φ = 64008.

The previous prime is 80629. The next prime is 80651. The reversal of 80645 is 54608.

It can be written as a sum of positive squares in only one way, i.e., 64516 + 16129 = 254^2 + 127^2 .

It is not a de Polignac number, because 80645 - 2⁴ = 80629 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 80645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 572 + ... + 698.

It is an arithmetic number, because the mean of its divisors is an integer number (16257).

2⁸⁰⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

80645 is a deficient number, since it is larger than the sum of its proper divisors (16897).

80645 is an equidigital number, since it uses as much as digits as its factorization.

80645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 80645 is about 283.9806331425. The cubic root of 80645 is about 43.2041848369.

The spelling of 80645 in words is "eighty thousand, six hundred forty-five".