645364189224 has 24 divisors (see below), whose sum is σ = 1747861346010. Its totient is φ = 215121396384.

The previous prime is 645364189207. The next prime is 645364189229. The reversal of 645364189224 is 422981463546.

645364189224 is a `hidden beast` number, since 6 + 4 + 536 + 4 + 1 + 89 + 2 + 24 = 666.

It can be written as a sum of positive squares in only one way, i.e., 424387102500 + 220977086724 = 651450^2 + 470082^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (645364189229) 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 5 ways as a sum of consecutive naturals, for example, 4481695687 + ... + 4481695830.

Almost surely, 2^645364189224 is an apocalyptic number.

It is an amenable number.

645364189224 is an abundant number, since it is smaller than the sum of its proper divisors (1102497156786).

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

645364189224 is a wasteful number, since it uses less digits than its factorization.

645364189224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8963391529 (or 8963391522 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 54.

The spelling of 645364189224 in words is "six hundred forty-five billion, three hundred sixty-four million, one hundred eighty-nine thousand, two hundred twenty-four".