80518045 has 4 divisors (see below), whose sum is σ = 96621660. Its totient is φ = 64414432.

The previous prime is 80518027. The next prime is 80518049. The reversal of 80518045 is 54081508.

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 30702681 + 49815364 = 5541^2 + 7058^2 .

It is a cyclic number.

It is not a de Polignac number, because 80518045 - 2⁵ = 80518013 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 80517998 and 80518016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80518049) 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, 8051800 + ... + 8051809.

It is an arithmetic number, because the mean of its divisors is an integer number (24155415).

Almost surely, 2^80518045 is an apocalyptic number.

It is an amenable number.

80518045 is a deficient number, since it is larger than the sum of its proper divisors (16103615).

80518045 is a wasteful number, since it uses less digits than its factorization.

80518045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16103614.

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 80518045 is about 8973.1847746494. The cubic root of 80518045 is about 431.8150160366.

The spelling of 80518045 in words is "eighty million, five hundred eighteen thousand, forty-five".