5018161865 has 4 divisors (see below), whose sum is σ = 6021794244. Its totient is φ = 4014529488.

The previous prime is 5018161861. The next prime is 5018161867. The reversal of 5018161865 is 5681618105.

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 2724422416 + 2293739449 = 52196^2 + 47893^2 .

It is a cyclic number.

It is not a de Polignac number, because 5018161865 - 2² = 5018161861 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5018161861) 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, 501816182 + ... + 501816191.

It is an arithmetic number, because the mean of its divisors is an integer number (1505448561).

Almost surely, 2^5018161865 is an apocalyptic number.

It is an amenable number.

5018161865 is a deficient number, since it is larger than the sum of its proper divisors (1003632379).

5018161865 is a wasteful number, since it uses less digits than its factorization.

5018161865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003632378.

The product of its (nonzero) digits is 57600, while the sum is 41.

The square root of 5018161865 is about 70838.9854882183. The cubic root of 5018161865 is about 1712.0438683596.

The spelling of 5018161865 in words is "five billion, eighteen million, one hundred sixty-one thousand, eight hundred sixty-five".