645043364 has 12 divisors (see below), whose sum is σ = 1290086784. Its totient is φ = 276447144.

The previous prime is 645043363. The next prime is 645043379. The reversal of 645043364 is 463340546.

645043364 is an admirable number.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (645043363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11518604 + ... + 11518659.

It is an arithmetic number, because the mean of its divisors is an integer number (107507232).

Almost surely, 2^645043364 is an apocalyptic number.

It is an amenable number.

645043364 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

645043364 is a wasteful number, since it uses less digits than its factorization.

645043364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23037274 (or 23037272 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 35.

The square root of 645043364 is about 25397.7039119681. The cubic root of 645043364 is about 864.0316221422.

The spelling of 645043364 in words is "six hundred forty-five million, forty-three thousand, three hundred sixty-four".