223645388568 has 64 divisors (see below), whose sum is σ = 639645361920. Its totient is φ = 63832828800.

The previous prime is 223645388543. The next prime is 223645388573. The reversal of 223645388568 is 865883546322.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 522363 + ... + 848618.

It is an arithmetic number, because the mean of its divisors is an integer number (9994458780).

Almost surely, 2^223645388568 is an apocalyptic number.

223645388568 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

223645388568 is an abundant number, since it is smaller than the sum of its proper divisors (415999973352).

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

223645388568 is a wasteful number, since it uses less digits than its factorization.

223645388568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371968 (or 1371964 counting only the distinct ones).

The product of its digits is 66355200, while the sum is 60.

The spelling of 223645388568 in words is "two hundred twenty-three billion, six hundred forty-five million, three hundred eighty-eight thousand, five hundred sixty-eight".