4218686656 has 56 divisors (see below), whose sum is σ = 8616628944. Its totient is φ = 2048148480.

The previous prime is 4218686639. The next prime is 4218686671. The reversal of 4218686656 is 6566868124.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471666 + ... + 480526.

It is an arithmetic number, because the mean of its divisors is an integer number (153868374).

Almost surely, 2^4218686656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4218686656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4308314472).

4218686656 is an abundant number, since it is smaller than the sum of its proper divisors (4397942288).

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

4218686656 is a wasteful number, since it uses less digits than its factorization.

4218686656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9089 (or 9079 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 52.

The square root of 4218686656 is about 64951.4176596631. The cubic root of 4218686656 is about 1615.8179303420.

The spelling of 4218686656 in words is "four billion, two hundred eighteen million, six hundred eighty-six thousand, six hundred fifty-six".