218355204057 has 16 divisors (see below), whose sum is σ = 292905119040. Its totient is φ = 144689529600.

The previous prime is 218355204019. The next prime is 218355204071. The reversal of 218355204057 is 750402553812.

It is not a de Polignac number, because 218355204057 - 2⁷ = 218355203929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (218355204257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255069 + ... + 708357.

It is an arithmetic number, because the mean of its divisors is an integer number (18306569940).

Almost surely, 2^218355204057 is an apocalyptic number.

It is an amenable number.

218355204057 is a deficient number, since it is larger than the sum of its proper divisors (74549914983).

218355204057 is a wasteful number, since it uses less digits than its factorization.

218355204057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454264.

The product of its (nonzero) digits is 336000, while the sum is 42.

Adding to 218355204057 its reverse (750402553812), we get a palindrome (968757757869).

The spelling of 218355204057 in words is "two hundred eighteen billion, three hundred fifty-five million, two hundred four thousand, fifty-seven".