518135378 has 4 divisors (see below), whose sum is σ = 777203070. Its totient is φ = 259067688.

The previous prime is 518135363. The next prime is 518135389. The reversal of 518135378 is 873531815.

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

It can be written as a sum of positive squares in only one way, i.e., 448295929 + 69839449 = 21173^2 + 8357^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129533843 + ... + 129533846.

Almost surely, 2^518135378 is an apocalyptic number.

518135378 is a deficient number, since it is larger than the sum of its proper divisors (259067692).

518135378 is a wasteful number, since it uses less digits than its factorization.

518135378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259067691.

The product of its digits is 100800, while the sum is 41.

The square root of 518135378 is about 22762.5872431057. The cubic root of 518135378 is about 803.1828295764.

The spelling of 518135378 in words is "five hundred eighteen million, one hundred thirty-five thousand, three hundred seventy-eight".