499121336698218 has 36 divisors (see below), whose sum is σ = 1171015443799110. Its totient is φ = 153575795906208.

The previous prime is 499121336698207. The next prime is 499121336698249. The reversal of 499121336698218 is 812896633121994.

499121336698218 is a `hidden beast` number, since 4 + 9 + 9 + 12 + 1 + 336 + 69 + 8 + 218 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 235691979221169 + 263429357477049 = 15352263^2 + 16230507^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 82038349473 + ... + 82038355556.

Almost surely, 2^{499121336698218} is an apocalyptic number.

499121336698218 is an abundant number, since it is smaller than the sum of its proper divisors (671894107100892).

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

499121336698218 is a wasteful number, since it uses less digits than its factorization.

499121336698218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164076705063 (or 164076705047 counting only the distinct ones).

The product of its digits is 241864704, while the sum is 72.

The spelling of 499121336698218 in words is "four hundred ninety-nine trillion, one hundred twenty-one billion, three hundred thirty-six million, six hundred ninety-eight thousand, two hundred eighteen".