218408029445 has 8 divisors (see below), whose sum is σ = 266001421344. Its totient is φ = 172118566224.

The previous prime is 218408029421. The next prime is 218408029481. The reversal of 218408029445 is 544920804812.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 218408029445 - 2²⁴ = 218391252229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 218408029445.

It is a congruent number.

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, 325981799 + ... + 325982468.

It is an arithmetic number, because the mean of its divisors is an integer number (33250177668).

Almost surely, 2^218408029445 is an apocalyptic number.

It is an amenable number.

218408029445 is a deficient number, since it is larger than the sum of its proper divisors (47593391899).

218408029445 is an equidigital number, since it uses as much as digits as its factorization.

218408029445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651964339.

The product of its (nonzero) digits is 737280, while the sum is 47.

The spelling of 218408029445 in words is "two hundred eighteen billion, four hundred eight million, twenty-nine thousand, four hundred forty-five".