518318279642 has 16 divisors (see below), whose sum is σ = 789409336032. Its totient is φ = 255185047920.

The previous prime is 518318279627. The next prime is 518318279669. The reversal of 518318279642 is 246972813815.

It is a super-2 number, since 2×518318279642² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479093 + ... + 1125240.

It is an arithmetic number, because the mean of its divisors is an integer number (49338083502).

Almost surely, 2^518318279642 is an apocalyptic number.

518318279642 is a deficient number, since it is larger than the sum of its proper divisors (271091056390).

518318279642 is a wasteful number, since it uses less digits than its factorization.

518318279642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606813.

The product of its digits is 5806080, while the sum is 56.

The spelling of 518318279642 in words is "five hundred eighteen billion, three hundred eighteen million, two hundred seventy-nine thousand, six hundred forty-two".