645141168376 has 16 divisors (see below), whose sum is σ = 1209658249800. Its totient is φ = 322565635104.

The previous prime is 645141168317. The next prime is 645141168377. The reversal of 645141168376 is 673861141546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645141168377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31890 + ... + 1136353.

Almost surely, 2^645141168376 is an apocalyptic number.

It is an amenable number.

645141168376 is a deficient number, since it is larger than the sum of its proper divisors (564517081424).

645141168376 is a wasteful number, since it uses less digits than its factorization.

645141168376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237278 (or 1237274 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 52.

The spelling of 645141168376 in words is "six hundred forty-five billion, one hundred forty-one million, one hundred sixty-eight thousand, three hundred seventy-six".