218348980405 has 8 divisors (see below), whose sum is σ = 262042298784. Its totient is φ = 174663502800.

The previous prime is 218348980391. The next prime is 218348980453. The reversal of 218348980405 is 504089843812.

218348980405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-218348980405 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1898751 + ... + 2010460.

It is an arithmetic number, because the mean of its divisors is an integer number (32755287348).

Almost surely, 2^218348980405 is an apocalyptic number.

It is an amenable number.

218348980405 is a deficient number, since it is larger than the sum of its proper divisors (43693318379).

218348980405 is a wasteful number, since it uses less digits than its factorization.

218348980405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3920387.

The product of its (nonzero) digits is 2211840, while the sum is 52.

The spelling of 218348980405 in words is "two hundred eighteen billion, three hundred forty-eight million, nine hundred eighty thousand, four hundred five".