223664011605 has 48 divisors (see below), whose sum is σ = 410538248640. Its totient is φ = 112257160704.

The previous prime is 223664011561. The next prime is 223664011607. The reversal of 223664011605 is 506110466322.

223664011605 is a `hidden beast` number, since 2 + 2 + 3 + 6 + 6 + 40 + 1 + 1 + 605 = 666.

It is not a de Polignac number, because 223664011605 - 2¹² = 223664007509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 223664011605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223664011607) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10671226 + ... + 10692164.

It is an arithmetic number, because the mean of its divisors is an integer number (8552880180).

Almost surely, 2^223664011605 is an apocalyptic number.

It is an amenable number.

223664011605 is a deficient number, since it is larger than the sum of its proper divisors (186874237035).

223664011605 is a wasteful number, since it uses less digits than its factorization.

223664011605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34930 (or 34927 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

Adding to 223664011605 its reverse (506110466322), we get a palindrome (729774477927).

The spelling of 223664011605 in words is "two hundred twenty-three billion, six hundred sixty-four million, eleven thousand, six hundred five".