511223226664 has 16 divisors (see below), whose sum is σ = 980835261120. Its totient is φ = 249667157040.

The previous prime is 511223226643. The next prime is 511223226713. The reversal of 511223226664 is 466622322115.

It is a happy number.

It is a super-2 number, since 2×511223226664² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 743056672 + ... + 743057359.

It is an arithmetic number, because the mean of its divisors is an integer number (61302203820).

Almost surely, 2^511223226664 is an apocalyptic number.

It is an amenable number.

511223226664 is a deficient number, since it is larger than the sum of its proper divisors (469612034456).

511223226664 is a wasteful number, since it uses less digits than its factorization.

511223226664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486114080 (or 1486114076 counting only the distinct ones).

The product of its digits is 207360, while the sum is 40.

Adding to 511223226664 its reverse (466622322115), we get a palindrome (977845548779).

The spelling of 511223226664 in words is "five hundred eleven billion, two hundred twenty-three million, two hundred twenty-six thousand, six hundred sixty-four".