645135312 has 40 divisors (see below), whose sum is σ = 1764637056. Its totient is φ = 202395136.

The previous prime is 645135289. The next prime is 645135319. The reversal of 645135312 is 213531546.

It is a self number, because there is not a number n which added to its sum of digits gives 645135312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645135319) 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, 394488 + ... + 396119.

Almost surely, 2^645135312 is an apocalyptic number.

It is an amenable number.

645135312 is an abundant number, since it is smaller than the sum of its proper divisors (1119501744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645135312 is a wasteful number, since it uses less digits than its factorization.

645135312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790635 (or 790629 counting only the distinct ones).

The product of its digits is 10800, while the sum is 30.

The square root of 645135312 is about 25399.5140110987. The cubic root of 645135312 is about 864.0726747853.

Adding to 645135312 its reverse (213531546), we get a palindrome (858666858).

The spelling of 645135312 in words is "six hundred forty-five million, one hundred thirty-five thousand, three hundred twelve".