645034512 has 20 divisors (see below), whose sum is σ = 1666339280. Its totient is φ = 215011488.

The previous prime is 645034463. The next prime is 645034541. The reversal of 645034512 is 215430546.

It is a self number, because there is not a number n which added to its sum of digits gives 645034512.

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, 6719062 + ... + 6719157.

It is an arithmetic number, because the mean of its divisors is an integer number (83316964).

Almost surely, 2^645034512 is an apocalyptic number.

It is an amenable number.

645034512 is an abundant number, since it is smaller than the sum of its proper divisors (1021304768).

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

645034512 is a wasteful number, since it uses less digits than its factorization.

645034512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13438230 (or 13438224 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 645034512 is about 25397.5296436484. The cubic root of 645034512 is about 864.0276697243.

It can be divided in two parts, 645034 and 512, that added together give a palindrome (645546).

The spelling of 645034512 in words is "six hundred forty-five million, thirty-four thousand, five hundred twelve".