645245335312 has 40 divisors (see below), whose sum is σ = 1252660190936. Its totient is φ = 321978848256.

The previous prime is 645245335279. The next prime is 645245335313. The reversal of 645245335312 is 213533542546.

It can be written as a sum of positive squares in 4 ways, for example, as 506038740496 + 139206594816 = 711364^2 + 373104^2 .

It is not an unprimeable number, because it can be changed into a prime (645245335313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16458838 + ... + 16497994.

Almost surely, 2^645245335312 is an apocalyptic number.

It is an amenable number.

645245335312 is a deficient number, since it is larger than the sum of its proper divisors (607414855624).

645245335312 is a wasteful number, since it uses less digits than its factorization.

645245335312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41195 (or 41189 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 43.

Adding to 645245335312 its reverse (213533542546), we get a palindrome (858778877858).

The spelling of 645245335312 in words is "six hundred forty-five billion, two hundred forty-five million, three hundred thirty-five thousand, three hundred twelve".