218958213395 has 16 divisors (see below), whose sum is σ = 264757480320. Its totient is φ = 173832597504.

The previous prime is 218958213371. The next prime is 218958213431. The reversal of 218958213395 is 593312859812.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 218958213395 - 2²² = 218954019091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 218958213395.

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, 117302 + ... + 672068.

It is an arithmetic number, because the mean of its divisors is an integer number (16547342520).

Almost surely, 2^218958213395 is an apocalyptic number.

218958213395 is a deficient number, since it is larger than the sum of its proper divisors (45799266925).

218958213395 is a wasteful number, since it uses less digits than its factorization.

218958213395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555374.

The product of its digits is 4665600, while the sum is 56.

The spelling of 218958213395 in words is "two hundred eighteen billion, nine hundred fifty-eight million, two hundred thirteen thousand, three hundred ninety-five".