218655957436 has 24 divisors (see below), whose sum is σ = 438857202560. Its totient is φ = 93378562992.

The previous prime is 218655957433. The next prime is 218655957461. The reversal of 218655957436 is 634759556812.

218655957436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218655957433) by changing a digit.

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, 13789146 + ... + 13804993.

Almost surely, 2^218655957436 is an apocalyptic number.

It is an amenable number.

218655957436 is an abundant number, since it is smaller than the sum of its proper divisors (220201245124).

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

218655957436 is a wasteful number, since it uses less digits than its factorization.

218655957436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27594433 (or 27594431 counting only the distinct ones).

The product of its digits is 54432000, while the sum is 61.

The spelling of 218655957436 in words is "two hundred eighteen billion, six hundred fifty-five million, nine hundred fifty-seven thousand, four hundred thirty-six".