223478640576 has 56 divisors (see below), whose sum is σ = 656985823440. Its totient is φ = 74492879616.

The previous prime is 223478640569. The next prime is 223478640587. The reversal of 223478640576 is 675046874322.

223478640576 is a `hidden beast` number, since 2 + 2 + 3 + 4 + 7 + 8 + 64 + 0 + 576 = 666.

It is a super-2 number, since 2×223478640576² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 7 ways as a sum of consecutive naturals, for example, 64662231 + ... + 64665686.

Almost surely, 2^223478640576 is an apocalyptic number.

It is an amenable number.

223478640576 is an abundant number, since it is smaller than the sum of its proper divisors (433507182864).

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

223478640576 is a wasteful number, since it uses less digits than its factorization.

223478640576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129327938 (or 129327922 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 54.

The spelling of 223478640576 in words is "two hundred twenty-three billion, four hundred seventy-eight million, six hundred forty thousand, five hundred seventy-six".