218553351855 has 32 divisors (see below), whose sum is σ = 350850528000. Its totient is φ = 116173930752.

The previous prime is 218553351803. The next prime is 218553351889. The reversal of 218553351855 is 558153355812.

It is not a de Polignac number, because 218553351855 - 2¹² = 218553347759 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 218553351798 and 218553351807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6878796 + ... + 6910494.

It is an arithmetic number, because the mean of its divisors is an integer number (10964079000).

Almost surely, 2^218553351855 is an apocalyptic number.

218553351855 is a deficient number, since it is larger than the sum of its proper divisors (132297176145).

218553351855 is a wasteful number, since it uses less digits than its factorization.

218553351855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33223.

The product of its digits is 3600000, while the sum is 51.

The spelling of 218553351855 in words is "two hundred eighteen billion, five hundred fifty-three million, three hundred fifty-one thousand, eight hundred fifty-five".