218158391334 has 32 divisors (see below), whose sum is σ = 481340097504. Its totient is φ = 65488446720.

The previous prime is 218158391251. The next prime is 218158391351. The reversal of 218158391334 is 433193851812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34105369 + ... + 34111764.

It is an arithmetic number, because the mean of its divisors is an integer number (15041878047).

Almost surely, 2^218158391334 is an apocalyptic number.

218158391334 is an abundant number, since it is smaller than the sum of its proper divisors (263181706170).

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

218158391334 is a wasteful number, since it uses less digits than its factorization.

218158391334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68217192.

The product of its digits is 622080, while the sum is 48.

The spelling of 218158391334 in words is "two hundred eighteen billion, one hundred fifty-eight million, three hundred ninety-one thousand, three hundred thirty-four".