4512321644 has 12 divisors (see below), whose sum is σ = 7973229264. Its totient is φ = 2234256144.

The previous prime is 4512321637. The next prime is 4512321689. The reversal of 4512321644 is 4461232154.

It is a super-2 number, since 2×4512321644² = 40722093237821725472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4512321644.

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, 5475707 + ... + 5476530.

It is an arithmetic number, because the mean of its divisors is an integer number (664435772).

Almost surely, 2^4512321644 is an apocalyptic number.

It is an amenable number.

4512321644 is a deficient number, since it is larger than the sum of its proper divisors (3460907620).

4512321644 is a wasteful number, since it uses less digits than its factorization.

4512321644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10952344 (or 10952342 counting only the distinct ones).

The product of its digits is 23040, while the sum is 32.

The square root of 4512321644 is about 67173.8166550033. The cubic root of 4512321644 is about 1652.4691094295.

Adding to 4512321644 its reverse (4461232154), we get a palindrome (8973553798).

The spelling of 4512321644 in words is "four billion, five hundred twelve million, three hundred twenty-one thousand, six hundred forty-four".