218351129853 has 16 divisors (see below), whose sum is σ = 308349529920. Its totient is φ = 136965025536.

The previous prime is 218351129839. The next prime is 218351129869. The reversal of 218351129853 is 358921153812.

It is not a de Polignac number, because 218351129853 - 2²⁰ = 218350081277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218351129873) 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, 440175 + ... + 794012.

It is an arithmetic number, because the mean of its divisors is an integer number (19271845620).

Almost surely, 2^218351129853 is an apocalyptic number.

It is an amenable number.

218351129853 is a deficient number, since it is larger than the sum of its proper divisors (89998400067).

218351129853 is a wasteful number, since it uses less digits than its factorization.

218351129853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237676.

The product of its digits is 518400, while the sum is 48.

The spelling of 218351129853 in words is "two hundred eighteen billion, three hundred fifty-one million, one hundred twenty-nine thousand, eight hundred fifty-three".