80655845 has 4 divisors (see below), whose sum is σ = 96787020. Its totient is φ = 64524672.

The previous prime is 80655829. The next prime is 80655853. The reversal of 80655845 is 54855608.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38950081 + 41705764 = 6241^2 + 6458^2 .

It is a cyclic number.

It is not a de Polignac number, because 80655845 - 2⁴ = 80655829 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8065580 + ... + 8065589.

It is an arithmetic number, because the mean of its divisors is an integer number (24196755).

Almost surely, 2^80655845 is an apocalyptic number.

It is an amenable number.

80655845 is a deficient number, since it is larger than the sum of its proper divisors (16131175).

80655845 is a wasteful number, since it uses less digits than its factorization.

80655845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16131174.

The product of its (nonzero) digits is 192000, while the sum is 41.

The square root of 80655845 is about 8980.8599254192. The cubic root of 80655845 is about 432.0612142479.

The spelling of 80655845 in words is "eighty million, six hundred fifty-five thousand, eight hundred forty-five".