223966520642 has 18 divisors (see below), whose sum is σ = 338188195737. Its totient is φ = 111242034936.

The previous prime is 223966520623. The next prime is 223966520651. The reversal of 223966520642 is 246025669322.

It can be written as a sum of positive squares in 2 ways, for example, as 223907829721 + 58690921 = 473189^2 + 7661^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=334639.

It is a super-2 number, since 2×223966520642² (a number of 24 digits) contains 22 as substring.

It is a Duffinian 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 8 ways as a sum of consecutive naturals, for example, 109091288 + ... + 109093340.

Almost surely, 2^223966520642 is an apocalyptic number.

223966520642 is a deficient number, since it is larger than the sum of its proper divisors (114221675095).

223966520642 is an frugal number, since it uses more digits than its factorization.

223966520642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4434 (or 2218 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 47.

The spelling of 223966520642 in words is "two hundred twenty-three billion, nine hundred sixty-six million, five hundred twenty thousand, six hundred forty-two".