218234613534 has 32 divisors (see below), whose sum is σ = 520509888000. Its totient is φ = 59641757472.

The previous prime is 218234613523. The next prime is 218234613547. The reversal of 218234613534 is 435316432812.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112956909 + ... + 112958840.

It is an arithmetic number, because the mean of its divisors is an integer number (16265934000).

Almost surely, 2^218234613534 is an apocalyptic number.

218234613534 is an abundant number, since it is smaller than the sum of its proper divisors (302275274466).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218234613534 is a wasteful number, since it uses less digits than its factorization.

218234613534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225915784.

The product of its digits is 414720, while the sum is 42.

The spelling of 218234613534 in words is "two hundred eighteen billion, two hundred thirty-four million, six hundred thirteen thousand, five hundred thirty-four".