5118815778 has 32 divisors (see below), whose sum is σ = 10481253120. Its totient is φ = 1665847680.

The previous prime is 5118815771. The next prime is 5118815851. The reversal of 5118815778 is 8775188115.

It is a self number, because there is not a number n which added to its sum of digits gives 5118815778.

It is not an unprimeable number, because it can be changed into a prime (5118815771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93148 + ... + 137528.

It is an arithmetic number, because the mean of its divisors is an integer number (327539160).

Almost surely, 2^5118815778 is an apocalyptic number.

5118815778 is an abundant number, since it is smaller than the sum of its proper divisors (5362437342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5118815778 is a wasteful number, since it uses less digits than its factorization.

5118815778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44842.

The product of its digits is 627200, while the sum is 51.

The square root of 5118815778 is about 71545.8997986607. The cubic root of 5118815778 is about 1723.4148600628.

It can be divided in two parts, 51188 and 15778, that added together give a palindrome (66966).

The spelling of 5118815778 in words is "five billion, one hundred eighteen million, eight hundred fifteen thousand, seven hundred seventy-eight".